[z28cam1981]

I just got a monty x-alp 219 from a buddy of mine but it is not complete it needs cranks front sprocket freewheel and chain, but i have no Idea what parts to use or where to find them the local bike shops havent even seen a trials bike ever, with the cranks its a small square drive bottom bracket but It looks like the cranks have to be offset becuase if they went straight out they would hit the frame, and what gear ratio is commonly used for trials. im new to this and the price was right on the bike (free) so I figured I'd have a go at it. any help would be greatly appreciated.