Need some help, not a clue what I'm doing.

A friend recommended kicker subs and amp. Here's what I'm looking at but like the title says I'm pretty clueless.

Subs and box : http://www.hifisoundconnection.com/...222221296225240237228229232245234247248239234

Amp: http://www.hifisoundconnection.com/...222221296225240237228229232245234247248239234

I have no idea what kind of head unit I need so I'd like some suggestions on that too.

My car is a 2004 Toyota Matrix XR