yamkod400

So I recently got a 2003 Yamaha Kodiak 400 4x4 as a winter project but is needing less work then I thought, but I do have an issue and asking a tip. The issue is im loosing oil but my rear swing arm boot is ripped so im trying to confirm its that, and I have no lights for gearing but it seems to go in all gears besides park for. sure is not acting complete right, how can I tell if it has both high and low or if one is both. thanks in advance