Yes you do, but you could just wait until you get here and the prof tells you what you need. Also, sometimes upper class men will sell there books to you. We do not have used books in the book store. I would think this is because the books are updated so often, they would be stuck with out-dated material. All the text books are on reserve in the library also, so if you need to read something before you have your own copy, you can check them out. I know several people will tell you that you do not need to buy any texts. I don't think they are right. They always say that you can just use the library's copy, that is true while you are a student, but what about when you graduate and are in practice? Every quarter I buy 2 or 3 books, that way I will have one hell of a medical/ophthalmic library for my practice. Also, this way it only costs me a couple hundred dollars at a time. If I were to buy all these books after I graduate it would be several thousand.
Your physiology and biochemistry texts from undergrad will be just fine for those classes, but you may want to look for Netter's Atlas of Human Anatomy. That is a book almost every buys.