I'm gonna say it...
I think you have rather high expectations of the car, there are issues that need to addressed for sure, paint defects etc. But most of this is part and parcel of owning an old car.
Panel fit from the factory wasn't great, glue stains on the headling are from factory glue.
Alloy wheels can lose pressure even on new cars, and the older they get the more chance they have of leaking.
Your car is 20 odd years and things will break and need replacing, you need to be prepared for this.
For a £2500 job you aren't going to get a new car, lets's see some pictures of the whole car.