I own a 2000 grnad prix se with 168k on it and now am starting to get nickeled and dime in repairs. In the last week I have had the following issues arise.

-No interior lighting works except for radio
-Fog lights no longer work
-Headlights don't work except on high beam
-No running lights on back of vehicle
-And only highest speed on interior for heat / cool.

Does anyone have any possible ideas as to where I should start and what I should fix?