please tell how much budget u have allocated in your mind or planning to spend on it.
the list is bigger and also includes the body work as i can see the roof has been closed partially to ab=void water leakage.
it will be definitely expensive and harder to find parts. do like this:
1) Complete wiring - Get it repaired as @xulfiqar sb said. the below point 6/7/8/9/14/11 will be sorted by clearing out the wiring issue
6- Speedometer, rmp gauges doesnt work
7- Power steering oil reservoir
8- Driving side door lock control system
9- Dashboard clock
14- Power mirrors doesnt work
11- Sunroof doesnt work (ask electrician to check wiring and its mechanism)
Sort out the drain tubing inside the roof which channels the rain water. it might be blocked. if the body from roof is rusted then get body work done to resolve the water leakage from roof and trunk.
15- Water leakage from the roof and trunk
Once the body work is done, then find the right or similar compressor. then go for the below points
1-Front and Rear Bumper(UK model flat front bumper - Photo attached) - impossible to find
2- Tail Lights
3- Front bumper lights + parking lights
5- Door rubber seals (4 doors and trunk)
13- Other engine/body parts as required
The heater issue can be resolved once compressor thing is done. the ac wala will open the things for ac installation, at that time the heater work can be done.
16- Entire interior needs to be redone - this work can be done after all the above points are achieved.