My cousin who recently got married was getting rid of some of his old bachelor pad junk and offered to give me his old subwoofer and amp. I said yes of course

but I have almost no idea what I'm doing with this stuff...
First of all this is what i got:
The sub is something like but not necessarily this model... I think it an older one that is discontinued...
http://www.sonicelectronix.com/item_...g-ZX-4722.html
This is the amp I got
http://www.walmart.com/ip/Sony-Xplod...ifier/20369612
I also got a somewhat shoddily built box for it but it doesn't really fit in my trunk the way it is now... I think I can manage to build one myself though thats not really the issue...
So here is the issue. I don't really have that big of a budget but I don't want to let this go to waste. What would anyone reccommend in terms of how to set this up, wiring, and anything else that may make this ridiculous amp fit into a mostly stock audio setup that won't be crazy unbalanced. I don't even know if this amp will really work well with the sub
what do I need to buy still? and what how hard will it be to set this up?