You can buy amp wiring kits with everything you need. If your going to run just that 1 amp then 8ga wire will be fine. You'll want to find a switched 12v source from your radio to turn on/off your when you turn on/off your radio or your amp will be on all the time like your buddy mentioned and your battery will die.
Typically amp power wire is different than normal wire. To keep it simple there is alot more strands (usually fine wire) to help carry the current (amperage).
You usually want to put fuse 6-12" from battery. This is more of safety in case you get a short somewhere to back and the fuse blows instead of wire heating up and catching fire.