When it comes to cost it's impossible to know as you don't know the extent of the damage & exactly how much work is required until you start digging...
You're being paranoid & needlessly looking too deep into things, the calipers are exactly the same regardless of ABS, the only difference in calipers...
If you want to take it there, you should look out for the Oldtimers GP. I go to the ring quite regularly and this is the event I most want to take my...
That's nothing unusual tbh, they do make that noise when taking it to the end of the steering lock & holding it there when the car is stationary. I'd...