No electrical power?

The car listed above is a Daytona charger. I went to start it and my screen started flashing different messages ranging from put my security code in, which I have no idea to turn off my seat warmers. Push start button was in run position, but the engine wasn't started. My MPH and rims were registering like the motor was on. The trunk wouldn't open so I crawled through the back seat to open and disconnected the positive on the battery just so everything would shut off then I reconnected. Now when you open the door no lights come on. The only thing that is staying lite is the gear selector. If I try to move my power seat the light on the gear shift goes off. I replaced the battery in the key fob but still have no power.