Garry's mod DarkRP help-Spawning cars from F4 menu.

So, right now you can spawn cars from the F4 menu. But, you can spawn cars loads of times. So, I want to know how you can only spawn cars once and how you can take it away. Also, once you buy a car it won’t save. So, is there anyone out there to help me?

Use the TCB Car Dealer, it’s free bruh