What could be causing electrical problems on a 2006 V6 Ford Mustang convertible?

Just bought this car less than a week ago. It has 42K miles. Today when I opened the door the interior lights did not come on. The car starts okay but the top will not go down nor will the windows. The electric locks also don't work. Headlights do work. Also, the when the door is shut the window goes up just a little bit to seal to the top-- this is also still functioning. I'm taking it to have it looked at today, but I'm really nervous about what it could be. Doesn't seem like fuses since it's not just one thing not working.

Any number of things, one baffling electrical issue after another in two of our cars, turned out to be mice getting in and munching the wires.