A quick guess is that they disconnected the battery and then forced the door open over the seals in order to keep the window in the "up" position...
If so, you'll need to reprogram the windows. Run each down all the way and hold the button there for about 10 seconds. Make sure you push the button all the way down. That should reprogram your windows.
Your radio issue is a dead volume control... needs to be replaced.
Hope this helps.
1996 S500 Coupe