90 N/A Chassis S5 TII

I have two problems im trying to figure out atm, ive got the click problem and a possible alarm system problem i dont know yet.

The one i think thats tied to the alarm happens when i start the car, a few seconds later the headlights will turn on and the alarm horn will honk continuously. This seems to happen randomly but quite often when i start the car. I had just unplugged the horn as a temp fix to stop all the damn noise ha. Note to this that the headlights do not pop up when this happens. Where should i start on this one?

The other is the infamous click click start problem that i know a lot of fc owners go through sooner or later. I replaced the starter to see if it was just the solenoid but didn't fix the problem. Seems to be either the ignition switch or possibly bad connections at the fuse box. Anyone?

 

Id get a problem that that when I switched the key it would either be dead or I'd get a single click. It was caused by corosion around the battery and fuse box area.