Can be a number of things....but start with crank angle sensor located rear of engine above bell housing asuming it's a 4L six.
The engine needs good battery power, fuel and spark to start and run. You are missing one of those.
No, yj's have leaf springs while tj's have coil springs, they wont match at all
Go get a new one... Its ganna cost more to fix then just to get a new one.
No, timing is not adjustable. If timing is not correct a part has failed.
Have you checked the battery for loose connections? wait is dis on a game
Broken bulb, or the wiring is shot.
Bulb in dash or sensor at t-case.
If it will shift when the engine is off, but not while it is running your clutch is not working
No Sir, They have diff lug patterns a 2008 WRANGLER has a 5x5.5 and i believe a 98 WRANGLER has a 5x4.5 pattern. no they wont fit you need wheel adaptors and the JK has a 5on5 bolt pattern TJ has a 5on4.5 bolt pattern and all CJs had a 5on5.5 bolt pattern
Could be a loose or corrodedbattery cable.
Yes both are possibilities. Also axle, driveshaft, .....
Almost all accessories will work for the 2005 Jeep Wrangler Unlimited (LJ) and any 1997-2006 Jeep Wrangler (TJ). The 2004-2006 Unlmiteds simply have a longer wheelbase...any body parts and soft top/hard top parts probably wont work. Bumpers/lights/stereos/winches should work. If the part you are looking to use would mount on the Jeep length wise, it most likely won't. If it would mount on the vehicle width wise, it most likely will.