Good choice on the OEM foglights. When you get the foglight bumper, you will understand why we recommended this route.
The OEM foglights have a very odd attachment design. The way the plastic housing attaches to the bumper and to the actual foglight is pretty stupid.
Adding aftermarket foglights with their universal attachment is tough, especially when your trying to decide where to mount them, and how to center them in the opening of the bumper.
OEM is the best way to go.
Down the road, grab some decent projectors, do a retro into the foglights, add a hid kit, and you will be golden. This will get you some experience and knowledge for retro's, then you can do your headlights to match
As for wiring, pickup a wiring harness, you
DON'T have to use a switch. You will have to connect a ground and power to the battery (don't attach the ground to the battery, find somewhere else), and one more power wire for the signal.
Take out your headlight, and find the purple/white/black wire (I think that should be + low beam - double check this though, I'm not 100% sure) and splice into that from the wiring harness for the fogs.
This way the fogs will turn on when your headlights are turned, and you will be drawing power from the battery, not from the cars stock wiring harness (which by the way cannot handle both the headlight and foglight bulb)...
The OEM harness will cost you a pretty penny, a wiring harness will not. Check eBay...
~Amit