Where in Florida are you at?
You are on the right track by bypassing the fuel tank with fresh gas.
The Carb is probably a gummed up mess at this point. I would probably remove the carb and fuel filter. At a minumum clean out the carb with a can of carb cleaner. Get it rebuilt if thats feasible.
Check you coolant and belts. Thermostat is probably frozen shut and will cause it to overheat. Its probably ok to start it up with old belts as long as they are there and intact. just expect them to howl and make a lot of noise. Draining and replacing the coolant might not be a bad idea either. If there is any in there.
A new battery. (probably obvious)
Without the key, you have a couple options. You can swap in a new or used ingnition cylinder (with a key). Or you can hotwire the car from either the ignition switch or the solonoid switch on the fender apron. A remote starter switch is only a few bucks and will clip on the the solonoid and act as a starter switch. (you will want to get some help on this if you are not comfortable with auto electircal circuits) FYI: solonoid switches often go bad, so be prepared to replace this $20 part.
I would say you need to decide how committed you are to getting this thing running asap. If you committment level is high, you may want to bite the bullit and start putting in some new parts before starting it. ie: belts hoses thermostadt etc.
If you just want to 'see if she starts' before spending a lot of cash, you can take a few shortcuts. ie: jump start or swap in a battery from another car. Just go with the min investment of clean fuel, clean out the carb, new oil and hotwire it from the solonoid switch. If you go this route, and it starts, just don't take off on a road trip without further attention. The brakes are almost guaranteed to be shot and tires will not be reliable, even if they hold air.
04 SVT Cobra, Torch Red (daily driver)
67 'vert 302,4spd,Red/Red (almost ready!)
67 Coupe 289,auto,black/black,deluxe (sold)
67 Coupe I6 to V8 conversion (sold)