Here's the skinny...
If you already have a FL driver's license, you're good to go there.
Next, when your car gets here, you need to call the local police or sheriff's office and request a VIN Verification visit. Go online and print out this form:
http://www.columbiataxcollector.com/Portals/FL-Columbia-TaxCollector/PDF/82042.pdf Officer Friendly will come you where the car is, check the VIN, and complete the form... and likely talk your ear off about the car.
Take the form and all your other paperwork to the tax collector's office. If you've owned the car for more than six months, no sales/use taxes apply. If you haven't owned it for six months, you're going to pay a 6% sales tax.
There's a $225 tag fee for any new tag (unless you're transferring an existing one), but this fee is waived for Ancient cars (made before 1945) and Antiques made after 1945 and more than 30 years ago, so you should not get hit with the tag fee.
The current fee for an Antique tag is $20.60/year, but there are mileage limits on how much you can drive a car with an Antique tag. I think it's 3,000 miles per year, so if you're going to drive your car very much, or it's a very noticeable car, I would pay the extra $26 and get a regular tag. You also have to pay about $140.75 in various title transfer fees.
Here's a good breakout of it all...
https://www.flhsmv.gov/pdf/military/milpak.pdf