Check for recalls or service bulletins on-line or ask at local dealer. I would check fuses first and see if any blown. But it sounds like the "brain" of your car may be shorting or something. I think they are called an ECM..
check and see if it is the ignition switch hanging up when returning from the crank position, try wiggling the ignition switch with the key and see if everything comes on, if so, that's it