The car will have to be titled in the state you live in. The sales tax, registration, title, would be in FL. The only fees added (if you're financing) would be the vehicle inventory tax (not very much, under 100 probably--don't quote me) a Document and Deputy Fee (55 bucks, we have a title office that would do the registration for you)...the only downside is that most likely you'd have to actually come out and sign the paperwork. Most banks require this. So really, you're looking at about 150 dollars, plus your Florida tax, title, license, and a trip to beautiful Dallas.
Its all kind of confusing, but no, you do not need to have a drivers license in the state of purchase.