There are 4 easy steps to installing running boards on a truck.
Take the running boards and hardware out of the package
Line up the mounting brackets with the holes on your truck and bolt them on (If your truck doesn't have pre-drilled holes refer to the manufacturers instructions on where to drill)
Connect the running boards to the brackets after they are firmly secured
If lights are included, connect the wiring harness and wire it into your vehicle's electric system.