problems

So I was informed that nobody checked the oil on our Terryx 4x4 LE and now the solenoid clicks but the engine wont turn over? Is the crankshaft locked up? if it's not is there any ideas of how to fix this? We tried charging it but same results. the story is they heard a loud clicking noise...

We went out this weekend riding and were climbing a pretty steep long rocky road, then something began slipping, and when I say slipping I mean an occasional fairly loud bang and jarring slip. As we continued up the rocky road it began to get worse to about every 40-50 feet, not the same...