Welcome to the USA Daisy.
By now you see in the USA, we like everything BIG. Big houses, big cars, big meals, big... you get the picture.
Florida (told before) consists of retired NY (and new england) people. There is a law up here that when you turn 65, you have to move to Florida. And being that many of those retirees are very old and can barely walk or hear or see, it's not surprising they can't drive very well.
License plates (tags to you) are ruled by each state who can determine if there are two on your car (front and back) or one (just on the back). Flordia has one just on the back. Here in NY we have two.
Signal colors on cars are up to the manuf to make them orange or red. Brake lights must be red and there must be the standard lights on each side of the car and a third usually in the back winow. But it really doesn't matter what color the signals are because no one uses them anyway.
Now enjoy yourself but watch out for the alligators, pythons (imported from somewhere) the sink holes (Disney was built on the swamp/bog) and the occastional hurricane (it's that time of year). And if you see a flying cockroach, its a palmetto bug and it doesn't eat much.
