you need to open the manual ... it will tell you this stuff for sure
the amp turn-on lead is usually blue, it connects to the turn-on wire or connector on the amp.
As for the RCA's, depends on what you are trying to do. Use the fronts if it's an amp running full range speakers. Use the rear outputs set to "sub output" on the deck if you are using the amp only to run a sub (or two).