You're going to have to find the specs of the sub in order to build a good box for it. As for the other questions, you will need preferably a mono amp with anywhere from 200-350w or so, you can get away with less however. RMS(Root Mean Square) is what you want to look at. Peak means the amount of power the driver can handle for an instant but not a continuous amount. RMS is the amount that the driver can handle continuously safely. Im assuming the sub is 4ohm single voice coil, so you need an amp that puts out 2-300w rms @ 4ohm. Something like this would be good
http://www.onlinecarstereo.com/CarAu...roductID=16337You should be alright with an 8 gauge wire, but I would recommend the 4 gauge because you can upgrade your amp and sub later if you want and not have to run thicker wires. I like this brand
http://knukonceptz.com/productMaster...llation%20Kits pretty cheap and high quality.
To wire the amp, you must run a power wire to the battery, ground to the chassis, RCA cables to you head unit, a remote turn on the head unit, and speaker wire to the sub, probably 10 gauge wire will be more than enough.