What is the lever for directly under the steering wheel?
That's hand throttle.
I think the gear stick is the strong looking lever to the right of the steering wheel?, if so what gears do they have i'm guessing neutral, 1 forward gear and reverse?
Your gears are forward is first and back reverse then 2,3,4 and 5 in a standard H pattern, plus you have HI/LO lever on the floor, given you 10 forward and 2 reverse gearbox.
Is the cold start button in the open part of the engine cover left side just above the two
oil filters. I have seen people on youtube unscrewing and pumping them.
No that's the primer for the diesel. The cold start is up on the injector pump it is only 5mm in size.
how do I operate the PTO shaft.
You will need to pull up the hand clutch which is between you legs when sitting in the seat beside your left leg, and pull the small lever beside it up from the floor 1 notch to engage the PTO, then release the hand clutch again, you will need to increase the revs as your releasing the hand clutch or you will kill the engine.