Why in the name of all that is holy would you want a combination lock on your car? Locker yes, car seems like a ridiculous idea!
I think they call it gas.
As for making cars more expensive, it isn’t hard given what Ford charges you for a pick up which has suspension from the middle ages and an engine which would have seemed nice in the 70’s. If the Brits hadn’t been so stubborn and decided to do everything literally opposite of what the French do the cars would have been cheaper. Left hand drive cars are cheaper on average.