It completely depends on where you live and what winds you normally get. I wouldn't buy anything before you get lessons. Many times the cost of
lessons is absorbed into your first set of equipment - they give you credit for money spent on lessons.
To get started, either buy a trainer kite and DVD or go buy a stunt kite (2-line). The first is better. Master that thing, then go take lessons.
You'll save yourself a couple of hundred dollars in lessons doing easy stuff that is not dangerous.
Hampton