1996 Legacy Outback AWD Not working

I have A 96 Legacy Outback AWD Auto.I got the car and it has A ton of problems,that the old owner didn't tell me about.It not going in all wheel drive.It just sits there and the front wheels just soin on any kind of wet surface.We jacked it up and got under it and the rear driveshaft isn't turning at all even if we tried to restrict the front tires, it still didn't do nothing.I also have a real bad howeling sound coming from the right rear tire.I had a couple of friends that took it apart and looked at the wheel bearring,and they said it was fine and just put it back together,but I still think its the bearring?Alos if you go to apply the brakes,it goes right to the floor,but if you pump it they come up and hold.I'am really readt to JUNCK this thing!!Please help with some suggestions as to what I should try.Thanks

Something is broken in the center diff. I bet it was towed with two wheels on the ground. Odds are that the master cylinder has failed and that is why you have no brakes. I would just junk it, probably cost more than you paid for it to repair the center differential.

If it is a automatic,it has a clutch pack in the rear housing of the trans that works the awd.Plus there is a fuse on the fender well that says AWD.If there is a fuse in there it will disconnect the AWD The rear of the trans is just a few bolts.But the exhaust has to be dropped.Check the fuse first.

Check the FWD fuse as mentioned, but it might be time to replace the duty c solenoid and the brake master and slave cylinders (brake pedal going to teh floor). Oh, and get new tires!

hmmm...sounds like an excuse to swap in a limited slip center diff to me...

Seriously, though, all above are good pieces of advice, maybe with the exception of just scrapping it. What I'd do personally is get a new center diff from a junkyard if the existing one is too damaged to be rebuilt/too expensive to rebuild.