Get a long lab coat (traditional doctors coat) for your anatomy and micro labs. If you want to have more than 1 white coat to wear during the clinical years get a short white lab coat (the kind that is cut like a blazer). Definitely get a Stethoscope, and splurge a little, you don't need the nicest one but don't buy a piece of crap. Many of my classmates and I went with the Littman Cardiology III. I love it and haven't heard anyone complain about it. You don't really need anything other than a Stethoscope, but is nice to have your own BP cuff, Oto/Opthalmoscope, tunning forks, etc. If you can't afford them don't worry about getting them. Also when you are an enrolled med student Welch Allyn gives you a very large discount on great equipment, so it might be worth waiting to buy the diagnostic sets from them. You can check out the prices on their website.
Another valuble resource other than SDN on this topic is your upperclassmen. They should be able to tell you more accurately what it is you need. Good-Luck and enjoy your pre-clinical years.