You sound as though you have not been to Florida before, so here are a few of my usual hints (I have posted these on a number of forums).
1) The theme parks are NOT all next door to each other (two of the Universal ones are) but even they are miles from the Disney parks, for example the Disney complex is about the size of Manchester and the parks are miles from each other.
So you almost certainly need a car (or cars) to get around. It is just about do-able by free hotel coaches or public trainsport but it can be a pain.
2) The parks are HUGE, so dont plan to spend day after day, all day, walking round parks, particularly with kids. You can get "theme park burnout".
Try perhaps to alternate parks, a white knuckle park one day, a water park the next, maybe sea world the next and so on.
3) The two main competing companies are Disney and Universal (each have a number of parks). It makes sense to buy these 7 day or 14 day tickets, but they let you into Disney OR Universal (individual day tickets are so expensive it makes sense to buy 7 day or 14 day tickets).
So study who has what parks and which ones you want to go to.
Maybe buy a 7 day or 14 day ticket to Disney OR Univeral, then go for odd days to the OTHER parks that you want to.
For exmaple, we bought a 7 day pass for Universal (which got us into Wet and Wild AND Sea World), then just went into Epcot and Animal Kingdom of the Disney parks.
So as you can see, there are quite a few things to think about before you go.