I agree with @
CliffordK on the parts on that bike. I dunno what was equipped originally, but they look like they pulled some stuff from a parts bin and tossed it together. May mean it was a bike they are just trying to dump that a lot of thought hasn't been put into, may mean that parts were replaced with whatever as they broke. Looks like a nice cool frame tho, I'd probably pay that for it just for the frame.
Good news is if you are mechanically apt at all and have even a basic set of hand tools, you've got pretty much all you need to work on that bike. Getting a decent shifter and derailleur setup shouldn't cost much if you scrounge the secondhand market.