you can run everything but the washer nosel LED's. those things are death traps (too much amp draw)! Back in Grand Haven a kid turned his on in the highschool parking lot, blew up his car and both of his FnF ricer buddies parked next to him. Beware of the LED washer nosels!! just too much cool for the contour I guess.
anyways, you already went with cheap speakers(not price, quality), so you might as well go with a cheap best buy amp. the reason the guy said you dont need a cap is likely because none of their over-rated amplifiers can draw enough current for you to need one.