Hi and welcome to YT! Congrats on doing your research ahead of time. That is something many of us didn't do. You are already ahead of the game
As mentioned above, just search in all the subforums (the sticky threads are a good place to start..those are the threads at the top of every subforum) and the archives. Then, just ask all your questions. We are happy to help.
YTCA can refer you to good breeders in your area. You can contact them and inquire about prices. Yorkies need the same vaccinations as all dogs. I would search/inquire into vets in your area that are well aquainted with toy breeds if possible.