Gas side: regulator attaches to CO2 tank, gas supply hose attaches to regulator, gas disconnect attaches to hose and gas keg post.
Liquid side: liquid disconnect attaches to liquid keg post and liquid line, liquid line connects to tap, glass goes under tap. Set kegerator to about 40F, CO2 to about 12PSI, and use about 10 feet of 3/16" line for the liquid. That's about all there is to it.