1. That could be a valve tick, or possibly a rod tick. Or the valve(s) are out of adjustment.
2. Try checking the connections under the seat, making sure they are connected and not d/c'd and possibly grounding to metal. Another possibllity is the motor or the switch.
3. Check the bulbs. although in the manual, it does list fuses for the lights and they can be found underneath the knee pad below the steeringwheel - comes off with two screws holding on trim fasteners on the bottom.
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4. Sylvania Silverstars seem to work well (Catera' size H7). You can find them anywhere from Wal-mart to autoparts stores.. around 20-35 dollars IIRC.
5. Some paint fill kits from an autoparts store, or have the bumper re-painted.
6. I think those are integral to the bumper. Have a look for yourself if your not sure. The 2000/2001 MY bumper wont work so you cant replace it with that.