vaccinations for 6 year old dogs, and general questions

Sounds like you have the start to a good list, but I'd suggest no rawhides or greenies.  Stick with UNCOOKED raw meat bones such as marrow bones.
 
How much you feed depends on the food.  Do a search on the nutrition threads for some quality foods (you'll actually feed less of these than the supermarket brands which are actually pretty low quality).  Some good brands I can think of off the top of my head are Innova, Canidae, Eagle Pack, Timberwolf Organics, Wellness, and I think Solid Gold.  These would be found most likely at specialty pet stores, not the big ones.  They can also be ordered online.  For Innova, check [linkhttp://www.naturapet.com]www.naturapet.com[/link] for store locations and for canidae [linkhttp://www.canidae.com]www.canidae.com[/link] for store locations.  I am not sure of the other brands' web sites.
 
Also, they may give him a collar but you may eventually prefer to get your own. The one my SPCA gave Zoe was definitely only a temporary one since it was not made well.
 
Someone will be along to give more info on vaccinations but I know your dog should get heartworm tested every yr. and depending on where you live, you should also get frontline plus or another flea/tick prevention, esp. for warm months and a monthly heartworm preventative such as interceptor or heartguard.
 
Congrats on finding a dog!

It's likely that they'll give him an annual series of shots since they don't know what he's had before.  You shouldn't need to get him anymore shots for at least a year (3 if you're in a state like California).  However, you should find your own vet and get him in as soon as possible for a general check-up.  If there are no medical problems, you should be able to get out for less than $100.  Definitely get him heartworm tested too. 
Just guessing by the breed mix, I'd expect to feed about 3 cups a day of food.  I split it up into a morning and evening feeding.  Go with a premium brand of food and you and your new dog will be much happier.  The nutrition threads have lots of great information on good brands.
Other than what you've listed, you'll want to get a good brush.  I'm guessing he'll need regular grooming.  I can't think of anything else right off the top though.  As for tricks, you can find some suggestions on the training thread on this site too.  
Good luck and be sure to post some pictures of your new friend when you get a chance. 

Ok thanks for the information this is really great. I will change the rawhide. This is probably one of the most exciting things I have experienced. This is a great dog and a great rescue. Check this out they even bring the dog to your house! Just so they can check it out and all of that. I will keep you all updated!

The first vaccine round he is given is only a one year vaccine regardless of location.  After that first vaccination (and year) they can become three year vaccines depending on where you live and what vaccine it is. 
 
They usually vaccinate for Bordetella (kennel cough), a Distemper- Coronavirus- Lepto- Parvo- Parainfluenza type combo vaccine (we use DHLPPC made by Meriel), and then lastly Rabies.  Both the Distemper combo + Rabies vaccines can become 3 year vaccines after the initial first year depending on your location, but the Bordetella always stays a 1 year.... hope this helps!

Congratulations!

One thing I would suggest, as someone who has pulled many shelter dogs and learned a bit about what they need subsequently.  I would keep this dog very quiet and don't put a lot of pressure on your dog the first couple of weeks.  What your new dog needs is a quiet, consistent routine. 

Physically, change your new dog over gradually to a high-quality diet - ask the rescue representative what the dog has been on previously (I always placed the dog with a small bag of the old food).  If you like what they've been feeding there is no need to change, but there's no reason not to change either, unless the representative says there is some reason the dog is on that particular diet.  I like to start middle aged dogs on a good antioxidant supplement and a joint supplement- the joint supplement will coincidentally help refresh your new dog's coat and skin if he has "Ol' Roy" coat (dry, brittle, and strongly doggy smelling).

So let me just get this right. If I dont think the rescue is feeding him the healthiest dog food what should I change it to?

I listed some good foods in my previous response and also, check the nutrition threads for many discussions on this topic.  Or do a search on this board (look at top right, one of the options is search) on "foods" or "premium foods" etc.

I prefer to feed Eukanuba to my Pom.  But I feed my gsd Iams because I can get it cheaper at a wholesale store(they don't carry Euk).  If you don't mind the extra few bucks, I would go with Eukanuba.  Wellness is pretty good too.

Some dogs have sensitive stomachs, and need to have their foods changed gradually.  Ask the shelter what they feed, and buy a small bag of that food.  Then mix about 1/4 new food and 3/4 old food and feed that for a couple of days.  Then 1/2 and 1/2 for a few days, 3/4 and 1/4, and eventually feed only the new brand of food that you have bought.

The bag usually has an approximate feeding chart based on your dog's age and weight.  But you can always adjust this slightly if you think your dog is overweight or underweight.

ORIGINAL: Minty_Pups

I prefer to feed Eukanuba to my Pom.  But I feed my gsd Iams because I can get it cheaper at a wholesale store(they don't carry Euk).  If you don't mind the extra few bucks, I would go with Eukanuba.  Wellness is pretty good too.

 
Please read the nutrition threads.  There are a number of reasons why both of these foods are not considered very good.  They have a lot of fillers and the ingredients are not the best.  When I got Zoe she was being fed Iams so I continued it.  Then I read about the awful stuff that was actually in it and could not feed it anymore.  I thought she was doing well on it... she was shiny and seemed happy.  However, now that she is on Innova, which is made with all human grade ingredients, she is sooooooo soft and shiny.  My neighbor felt how soft she was and went out the next day to get innova for his 3 dogs and has loved it too.  I will post a link to a nutrition thread about this info.

I can't find the posts I really wanted to but this one has some discussion on it:
 
[linkhttp://forum.dog.com/asp/tm.asp?m=64541]http://forum.dog.com/asp/tm.asp?m=64541[/link]
 
EXCELLENT ARTICLE worth reading
[linkhttp://www.api4animals.org/facts.php?p=359&more=1]http://www.api4animals.org/facts.php?p=359&more=1[/link]
 
A list of good quality dog foods
[linkhttp://www.dogaware.com/dogfeeding.html#TopDry]http://www.dogaware.com/dogfeeding.html#TopDry[/link]
 
Also, this web site has a bunch of info on what the ingredients actually are and which are good and bad:
[linkhttp://www.dogfoodproject.com/index.php?page=betterproducts]http://www.dogfoodproject.com/index.php?page=betterproducts[/link]
 
Ingredients to avoid:
[linkhttp://www.dogfoodproject.com/index.php?page=badingredients]http://www.dogfoodproject.com/index.php?page=badingredients[/link]