Okay, my 2006 Jetta 2.5 is having some issues right now.

1. Air bag light is on. I haven't been hit or hit anything w my car, so I don't know why it's on.

2. Check engine light is on. How do I find out why?

3. The lightbulb light is also on, on the dashboard display. Nobody has been able to find any burnt bulbs on my car. Is there another reason why this light would be on?

4. Sometimes while driving I hear this knocking noise under the hood. Randomly happens. It sounds like it's coming from the passenger's side under the hood.

5. Most importantly, my friend drove my car last night and since this morning it has been making terrible winding/knocking noises. This happens if I'm driving in any gear 2nd and above, and if I'm not pressing the clutch, gas, or brakes, it makes this winding noise. It sounds like it's coming from near the front driver's side wheel but I don't notice any damage.