1) Lubricate moving parts around the area of noise if not, Problem: Transmission noisy when moving (RWD only) Quiet in Neutral when clutch engaged. Solution: Worn rear output shaft bearing.
2)Well, if you replaced the bulb, check fuse...you can buy a device off ebay to reset all indicator lights on your dash.
3)Could try useing gasoline to remove, but sometimes that rainbow effect is hard to get rid of. My guess is oil drip