I bought an arc welder that runs on 110/220.
The installation manual does not list the amps required for the circuit for the unit to work on 110 volts.

The only thing is says is that the "rated input capacity" is 10.7 kva

Can anyone help me on this one. I need to know if this unit can work on a standard 15 amp circuit, if not, how many amps do I need.

You can't run that on a 15 amp 120V circuit. It requires both 120V and 240V to work. You will need a 50 amp 120/240V circuit. That's two hots, a neutral and an equipment ground, four wires total. I would suggest you hire an electrician for this.

kva should be abrieviated kVA because k = 1000, V is a proper name and A is a proper name.

10.7 kVA is like watts, but different. We'll call it Watts (proper name) for this discussion.

Amps at 120 would be 10700/120 Amps.

I'll let you do the math. 20 A*120 V = 640 VA. As you can see it's not very much power.

It depends a lot on what your going to be welding. If your going to be welding up to the max tickness that tehe welder can do, then no.

It won't hurt to connect to a smaller current service, but it may not be adequate. It depends on what your going to weld.