My sister and I are interested in Job Corps and we were wondering if my sister could bring her car up and maybe be able to leave and visit family every once in a while?

I know some people were allowed to have their car but you'd need to get permission. You actually cannot leave campus for the first 4 weeks after that you can get a weekend pass that will allow you to go home for the weekend as long as you're back by curfew on Sunday. I would talk to your admission's councelor about where to get permission fir the car.

Not likely, you have to live off center or work off center.