You'll want to start out with 2 - 3 dozen prefolds for your newborn. Thy are cheap and easy to use - you don't even need a snappi! These "smart fit" prefolds fit easily (trifolded) into most covers. They work great with the Thirsties Duo Wraps!
Green Mountain Diapers - my favorite cloth diaper store. I have lots of Cloth-eez PFs w/snappis and a few dozen of the Workhorse diapers with snaps. Now that I have multiple children, I prefer the Workhorse - no folding & no snappi to keep track of.