joshy,
ALL of your questions have been experienced, discussed and almost solved by many a thread before you.
take some time an use the SEARCH function
1. lextech.org
2. get someone that knows electronics and use of a volt ohm meter to diagnose. Maybe a broken wire, may be a connection, my be corrosion.
3. read the "pinned" thread at the top of the ES forum about clearing corners. There are instructions about how to remove, separate and reseal the headlight lamps.
4. tons of suspension problem threads and suggestions, just use the search function.
5.
6. I think your year car had an additional key fob that had the buttons.
7. $135 is a good price from anyone, but keep in mind it will be a rebuilt or remanned. It should come with at least a year warranty.
8. The stalk is a cheap item and an easy fix. Search on antenna replacement, directions have been posted several times.
welcome to the club and enjoy the ride.
steviej