would they provide me with the wires like the wiring harness i need? because i only have the wires for the amp

They can, scheduling is an issue

Yes they can if they are smart enough to point it out to you

Probably. Why don't you ask them

Im not sure

I say ask the Geek Squad they are the best at that store the one in Crestwood sucks

I say check with the Techs in the back of the building where they do the installation work. They can tell you best what you need.