To put it in newbie terms: You cant' run that amplifier in your car unless you buy a new alternator or larger battery, and rewire some of the wiring in your car with bigger wire.
It uses too much power that your stock car cannot generate. If you try to use it, you are going to blow something up.
It sounds like you have no idea what you're doing, so once you do get the necessary electrical upgrades you need to go read the guide on how to correctly set your gains, or else again you're going to blow something up.
And as for subs, look for something else, there are much better options around here. I'd go for two AQ sd2.5's or something along those lines.