Eectrical problem

I have a 2000 eleantra wagon. First the horn did not work then in succession the interior lights stopped, radio failed and air conditioner blows hot air. Now we cannot get it out of park. something is not recognizing the brake is pressed. Engine starts and headlights are OK. No idications on dash of any problems. Suggestions on where to start.

I would say to check all of your fuses. Other than that, don't know what to tell you. But I'm not a mechanic or anything so. . .