Hella Light help? Switch maybe?
 

Can you use a 2-way switch when hooking up a switch for the foglights?

I see the diagram shows 3-ways, my jeep came with a 2-way.

2 way or 2 pole. 2 way controls 2 circuit 2 pole has 2 lugs. 3rd lug is usually only needed for a lighted switch.

Yes you can use a 2 way switch.

Constant power is ran to one side and then from the other side you run the power wire to what ever you want power to go to.

As stated on a 3 prong switch the 3rd spot is used to hook up a ground wire for the light built into the switch face.