drifting is something I would like to try, but won't be able to for a while due to time constraints. But there are a few things I would like to know before I ever get a car.

Do you need:

Roll cages built to certain standard?
External kill switches?
Plumbed in extinguishers?
Certain spec seats and belts? ( Do they need to be in date like rallying?)

Typically how much is entry for a day drifting? many tracks about ?

Do you need to do medicals or apply for any sort of licence?