Car won't crank, Guage lights flash, and how do I pull my starter?

Whew! This is amazing! As a guitar player, I can rewire an electric guitar and do all kinds of mods, but when it comes to cars, I'm a complete butthead in the electronics department! A cousin of mine, who is a master mechanic suggested that that I get everything back to original; I'm starting to believe it! However, I'm going to pull the starter, have it tested, get it out of the flowchart, and then fine tune the rest. The person who had the car before me sure dicked around with it. I'll just have to keep working through this Rubix cube. There is a goldmine of info here, and I sure appreciate it!