How else would coil overs attach?
Seriously though, about the only edit: (reasonably priced)
coilovers worth using are Ground Control. The adjustable kit is about $400 US.. comes with the front assemblies, rear adjustable perches and a set of springs, ERS, usually 300lb front 450lb rear. If you buy the kit with shocks and camber plates, you're looking around $1600. They come with custom konis.
What are your goals? If its LOW LOW LOW, then just get the adjustable kit with softer springs (you can specify any rate you want when you buy) and run your stock struts / shocks. Be prepared that you'll likely blow the fronts out within one season of daily driving. It will totally suck on the track.
If you want somewhat low, then go with a known good spring / shock combo, like H&R + bilsteins.
Search for more answers, don't just reply with another question. This should be enough to get you going! Good luck!