Can you give me an estimate on brakes, exhaust leek and engine light going on. on 2002 Volkswagen Golf

My son is looking at buying an uncertified 2002 Gulf that requires brakes, has an engine light that goes on apparently it goes out when a fuse is replace and also has two exhaust leeks. Can you give me a ball park on what these things would cost to repair.

Asked by for the 2002 Volkswagen Golf