My 2008 Dodge Magnum won't start only lights come on my key is not programed

First, resolve the "known" issues: Using a key that is not programmed. You have to resolve this prior to going down any other diagnostic paths.

Exactly 'HOW' could have you have possibly "been driving with a key that is not programed" - until this problem arose ? .. Now, for the "something else" part - *Google > Dodge ignition switch actuator pin* - I'm pretty sure that will cover both the Magnum AND the Caliber - which you have listed in your post. On the resulting Google page you should find plenty of information on the subject... Along with some YouTube videos. Good luck with it!