dial on your Fox's is for the REBOUND
damping. Set it slow enough so that the fork does not bounce back like a pogo stick when you compress it, but fast enough so that it can cope with rapid, successive bumps. I'd suggest finding a small section of track/pavement/road with a few successive small bumps and fiddling with the rebound until you find a setting which suits you. No setting is 'right' or 'wrong'.
dial on your RLCs (on your Zaskar) is for COMPRESSION damping. This controls the spring rate. Too much compression damping and you will not get the full amount of travel from your forks as they will 'ramp up' as they go through their travel. Too little damping and you will be able to bottom the forks out too easily. Again, experiment with it. No setting is right or wrong!
lever on the forks is the lockout. Turn it one way to lock the forks (so they're like rigid forks), and turn them the other way to unlock them.
cap on the other fork leg hides the air valve (I think). Unscrew this cap and you should see the valve. Attach a shock pump to it to add/reduce air pressure. Check out the owner's manual for the forks to see how much air to put in for your weight.
I usually put a little more air in than is recommended for my weight, as I like a slightly firmer fork.