can go for normal set ups la... get any entry level component set... cost around 200-350... for the front and replace the back speakers with any 2 way speakers roughly costing arnd 200 bucks.
go for a normal single din HU like pioneer/kenwood/jvc...
ur budget tak bleh main amps unless u wan those really cheap ones and still wiring/workmanship will cost u $$$

try to get a decent budget set of speakers incase u have more budget for an amp-driven setup later, also, later can tambah one more amp and a subwoofer for that extra punch enjoy the ICE poison