1986 Jeep Cherokee

I have a 1986 cherokee with a 2.6l. V-6, after coming home from iraq I went to drive my jeep witch has set-up in the garage since I left, the problem is I have no brakes unless I pump them at med. Speed 7-12 times before they catch and then it is lousy at best, I did notice a leak between master cylinder and brake booster, but not to bad it does not want to have any brakes without babying them, but that is the only problem that I can see the brake light stays on any response would be greatful, as this is the only thing that was not taken while I was gone.