You need to buy the garage separately, if you can't buy it at the blue garage door it's already owned. Once you do that you can interact with your garage using the windows key.
I do try to RP as much as possible in the redzone, but usually that boils down to yelling at the last survor of the guys camping the outpost that if he comes out and sticks his hands up he can take his friends guns and can leave unharmed. Most of them still choose the hard way out though...
Now who's gonna scream 'stop or die, stop or die!' 'see you on the forums' and 'ghobo'?
Buy yourself a VW mk1 and all your problems will be solved ;) Hope to see you around!