cos i'm from australia, i don't know exactly what your money will buy you.
but yes, you will need:
*sub + amp
*subbox to suit sub: every model sub differs in box requirements, so seek advice from the retailer as to what suits; subbox design is as important as the sub itself, so get it right
*powerwiring + fuse: wire gauge depends upon current draw (ampere) of amp
*RCA audio cables
*remote trigger wire: from headunit to amp, to trigger it on/off
*speakerwiring
*securing subbox into car: L-brackets, velcro, straps, other
perhaps something like:
*alpine type-S SWS-1043D 10" sub
*prefab 1.0cuft 'sealed' subbox (as opposed to 'ported')
*alpine MRP-M450 amplifier
