Well, here we go:
1.) Timing belt-If you are mechanically inclined (or know someone who is), and would enjoy spending 8 hours under the hood, then the timing belt should be no problem. When you do it, make sure you buy the tensioner and water pump as well, for those are all right near it. If you get the belt done at a shop, then it'll be like, 400-500 USD. I just did my timing belt with my Dad, and it isn't that hard. But make sure you have a Bentley manual or a good guide before you undergo the procedure. I can give you a good guide to doing it.
2.) Check some of the fuses for the tach and temp guage. Look on the instrument cluster, as well.
3.) You forgot to get the little fuse wire indicator thing that goes on the LF and RR brakes that turns off that wire. The wire rides on the brakes, and when it breaks open, it completes the circuit and the light comes on.
4.) Check your third tailight. If that works, then it's the bulb in the third tailight. Make sure you get the OEM spec bulbs, rather than a cheap brand. Otherwise, the light will stay on.
I hope all this helps! If you have any other questions, feel free to ask!
Three rocker arms later and I still haven't learned my lesson!