Are you are refering to the Federal Transfer Forms. If so you would need to go to a firearms dealer and fill out new Transfer Forms. They will often charge for this service. In most states there is no law regarding this. The private sale to a person from another state can cause some problems. I would check this with a Firearms dealer in your state.
There is no such registry in Florida. In fact Florida state law prohibits it. Are you acquiring the firearm or giving/selling it to someone else ... assuming you are talking about a transfer of ownership of a firearm from one person to another.
Some ppl will do it for 25 bucks. Some 50. U have to go to a shop or a FFL holder and fill out the paperwork just like you would be buying a new gun. But the guy has to be there that sold u the gun. I believe (not sure bout that part). then u have to do the 3 day or 24 hour wait and go pick it up.