I've often seen 5-10 years for various schools. Some will consider everything you've ever taken. For the University of Florida you should probably ask the University of Florida, maybe someone in the admissions department.
I agree with the previos poster. Most schools have a 5-10 year limit. I have credits over 5 years old, and they will take them, however none of them are pre-requisite courses. With that said, I don'tknow they have a limit. Since they don't offer grade forgiveness they average the two grades if you take the class twice. So if they didn't count older classes then one way to get around that would be to wait till the old one *expired* and then take again.
Also, since many go there with a 4 year degree, some of the classes at the end of a 4 year degree may be five years old if one took a little longer than expected. Typically classes like Chem 1 and Bio 1 would be the first semester.
I would contact the UFCOP admissions and ask. They would be able to give you better information.