How does the gameplay work? There is a garage for the cars, right? Is that garage safe place, I mean could it be destroyed? Does every car need a garage of it's own? Is there a manual somewhere of the gameplay mechanics?
These are all good questions

Every vehicle will come with a garage, but you will also need additional garages to save your a*s from Benzene hunters. The more garages you own across the Wasteland, the better your position is. You will also be able to rent these garages out to noobs and offer them protection.
https://warriders.com/wp/ - here you can find everything about the game

Thank you for clarifying and posting the white paper link. I will dive in it