2: depends on what you want to do, play your own style, or use what weapons come to you
just dont use 1 handed with shields, because real monks dont play that way
3: wait until your a little higher level
4: he should be somewhat hard
1. highest damage possible (weapon dps, dexterity, attack speed... All good for +damage)
2. Monks can use 2x 1handers or 2hands, Use whatever you prefer or whatever has the most weapon damage.
3. unless its a legendary it prob wont sell for much. hell even if its a good rare it wont sell for much.
4. He should be at last challenging. It helps to avoid his attacks and kite his skeles.