That ad's pretty good! I'd say it's a 95 or 96 Roadmaster body, but then the interior shots look like a 94-96 Caprice. A Caproadmaster? Must be one of those Canadian models!
The wagon(s) get(s) a lot of screen time. It's probably a good idea for a teen to train on a big car like that. If she can successfully drive that, smaller cars will be easier. But she clearly hasn't mastered the roadmaster. The last scene at the drive through was pretty funny.