Startor: Check the Coil wires, Plugs and Fuel make sure all are working good.
Horn: If its dead, an aftermarket one is like $20 and can connect to the old switch
Light: Need to pull the cluster out, and take the back off. Twist the light holder for the desirerd light and it comes out slick.
Breaking Issue: Sounds like a warped router, just a guess though.
Sorry for the quick response, but at work and prolly shouldn't even be on the site