1. You need to take off the interior panel, then there's a nut or two holding the handle on. Why are you taking it off?

2. Slipping clutch or chatter. My original went longer than 140,000. Cheap and not too diffacult to replace.

3. Follow the instructions that come with it. Wiring diagrams can be found on a lot of the keyless' sites. Trunk is cable popped, this would require some sort of actuator I would think.

4. My 92 does not, 95 may not.

5. How you drive the car is one way. Plugs, cap, rotor, fuel filter, overall tune of the motor. What's bad mileage?
I use a Haynes manual- it's been fine for everything I've done to mine (just about everything).