My R&P used to leak, had a shop check it out, and they put some type of liquid sealer in the PS Pump, and that fixed it. So you might try to find something like that.....
As far as the windows go, it's more than likely the window motor...
I've replaced all 4 motor/regulator assemblies in my car, 2 had shot motors, 2 had broken regulator tracks...It's a pretty easy install, just need to pop the door panels off, and use a 10mm to pull the assembly out.
The ABS light being on like that, it might be a wheel bearing that's shot.
Jack the car up, and give each tire a good firm shake side to side, if it wobbles, replace that bearing.
Good Luck!