Someone at the dealer already called the Vibe a Lemon. That makes me think they don't want your business. Also, the dealer will charge you 50% more than anywhere else.
Try to write down everything that is wrong with the car. Then take that list to a local mechanic. Have them inspect your car, tell them about your concerns, and work together to prioritize repairs. Here are a few highlights I've read so far.
- High idle
- Engine stalls out randomly
- Transmission does not shift properly
- Automatic headlights do not work
- Check engine light
Any professional auto mechanic can fix these cars, they are simple to work on, but it's really hard to diagnose issues as extensive as the ones you are having over the internet.