Car rental?

Hello dear community, 2 hours ago a nice gentleman with 1.7 promille drove up on my car – THANK YOU again. I don’t get such a Golf 3 in the form I have styled it up again. Now my question: Need the car urgently for work. The car is no longer ready to drive, as the doors no longer open and close. Total damage I would say, since the whole body has changed. I think I get a rental car from the insurance. In the last Report a month ago my car got a value of 2,800 euros. I say I would get something like that right? But now my question, how fast do I have to find a new car? I certainly can’t drive a rental car forever. Oh and what about all the fees for the registration and registration of my new vehicle? Is the insurance probably also refunded. Maybe someone can give me a general tip on how to behave now and what I do best… thank you and greetings, DocMAX