Thanks for the reply
How much work/cost was the compressor replacement? I believe that's what is damaged with mine (he just seems to be calling the compressor a pump), it's just mostly corrosion damage and if it falls apart (still works), then the car stops working and that's... a problem.
So far I think all of the damage I listed and any previous work was entirely due to road salt accelerating corrosion, the only exception is maybe the ABS sensor (which is currently working again, but it's intermittent).
Getting quotes for the work has proved difficult, and I'd rather not have to drive around garages, so just looking for ballpark figures of what to expect.