freestyle means tricks on a BMX
If you have a "normal" bike (whatever you mean by that), and want to do BMX style riding, then sure, get a BMX instead. But if you're not interested in tricks, stunts and jumps, then a "normal" bike will probable be more useful to you.
you can find a BMX bike in halfords
The bmx thruster rampage bike is a exellent bike
One can buy a custom BMX bike in Las Vegas from a few stores. One can get a BMX custom made from 'Just BMX', 'Bolder BMX', 'Bike World' and 'Vegas Bike Store'.
No if you mean a motorcycle bike then no but bmx bike scooter and go kart yes yes you can
A hyper is better
no but you can get a dirt bike or a cruiser bike or a speed bike but i havnt seen a bmx bike yet.
Most hyper bmx bikes are heavy so most likely not unless your not jumping high
It is 10 feet depends on how high the car is.
The type of bike that is mostly used form BMX riding are the purpose-built BMX bikes.
A street bike is a type of BMX bike, so your question can't be answered.