There are the two basic approaches, wire it up to use existing lights (brake light, front parking lights, etc.) or wire up additional lights. The later is much simpler wiring. With add-on lights a sample toggle switch and flasher canister can be used to turn the lights on/off. If you use the existing brake lights you need to reroute the brake wire to the a turn signal switch that allows for the dual function of brake signal and flasher signal. This is not super difficult just not as simple as add-on lights. I would also add, with either approach, a third brake light in the rear window. You can also add third brake lights that incorporate turn signals.
Henry had a post a while back with some LED add-on lights as well.