[skyphix]

With the Windows, take the door panel off and see if the power window motor is getting power. While you're in there, take a look at the condition of the track and clean/regrease if needed. I've fixed some older cars just be regreasing the window slides/track but it wont help if the regulator, motor, or switch have gone bad or you arent getting power. I assume its a power window, anyway.

for the gas gauge - what does it do? Peg to either empty or full, or just sit in one place somewhere on the gauge?

I'm not all that familiar with the in steering column pieces that move the shift marker. I know there's some plastic bits in there that get worn or break relatively commonly but I haven't jumped into those waters on my truck yet. I just live with it.