How do I get the light working right on this car?

What is your question?

Drove the car, everything worked perfect. Parked it and the next day had no headlights. Put new bulbs in lights and dimmer switch, didn't help but this is where it got really bad on me. Now the lights come on auto but then they will go off, if you turn the dimmer on we lose brake lights, interior lights, but will have headlights. I really don't know what is going on here! Any help or advice is appreciated! We also have to things showing up PO420 and PO325 if that has anything to do with it? Thank you, Kathie and John