if the bike is titled 'offroad', you will have a hard time. if it's untitled, but has a bill of sale, you can add the stuff i'll mention in a moment, show the bike and document to a FHP office for on-road worthyness and hope.
florida requires:
any turn signals the bike originally came with. put em back on if there are holes for em. if it never had any, add front and rear blinkers.
headlight, has to have a hi-beam and a low-beam. safe bet to make it a running light.
taillight, with a brighter brake light.
at least a left-side mirror.
a /working/ horn. the inspector will make you beep it. this shot me down recently. note: yelling BEEEP at the officer /is/ funny, but doesn't count.
and of course DOT rated tires.