.. the car runs and has been running just wont start with the key and all electrics r buggered
then it's time time to repair the buggered electrics with the aid of a wiring diagram and a a great deal of patience.
i'd suggest that you identify which circuits/sections of the car and engine looms are working correctly so you can focus you attention on the bits that are fuxord.
two reasons for this - so you know what bits to ignore, and you have some satisfaction of having [b]some[b] of the car work as designed.
also - what's the transplant recipient and have you done the work or had a workshop do it? U have wiring diagram(s) for the car and the engine?