Welcome to YorkieTalk! How old will your pup be? I would suggest looking into the best food for him. Here are some thing I would suggest you look into purchasing (if you haven't already):
-Cloud 9 bed- You can find them here:
Cloud Nine Beds*::*Bedding*::*Yorkie Haven Rescue Boutique
-Exercise pen - for potty training
-Grain free kibble
-Harness- or one once he's full grown. You can find inexpensive ferret harnesses at Petsmart if he's still a puppy
-Potty pads
-Collar - only for his tags, you don't want to walk a yorkie on a collar because they have sensitive tracheas
-A high quality brush - we use Madan brushes
-Quality shampoo
-Stainless steel bowls - for food/water
and I'm sure there are many more things you will need... That's all I can think of for now.
Have you found a good vet?