Electrical/Ignition problem or something worse
 

Hello all, I own 1998 Audi A6 Quattro and started having electrical problems at start up recently. My blinkers, headlights, Climate control blower, electric door locks wont work when i start the car. When I turn off the car or shift to another gear it makes a sound kinda like the one a car makes when u start it and its already on and the key is stuck in the ignition....any ideas what it might be and is it going to be expensive to fix??? Ps the car runs fine no hard shift or anything we thought it my be the transmission but i dont think it would have anything to do with all the other problems im having...any help would be great i just need to know what im in for.....THANKS!!!