1) i do not believe this is normal
2) scroll through the station you want, hold down a number 1-6 until it is set.
3) i believe the light stays on for a couple mins then it turns off.
4) i do not know
5) do you have a Harman Kardon system? If so, 3 on each door (2 upper, one large under), rear has a tweeter on each side, two large speakers on rear deck shelf, and two subs in the trunk. 3+3+1+1+1+1+2=12. Non HK systems do not have the subs, which comes to 10 speakers.