1) Start saving small amounts for a new car, it's either that or be stuck. Your decision to make on that part.

2) Drive the Charger until it stops running. I came from a piss poor family, we owned cars that had "transmission problems" for 5+ years before dying. It's possible that car will last longer than you expect.

3) Save up for a "beater", but not a $500 piece of shit. It's not all or nothing. You need to save about $3k-$4.5 and just pay cash for the cheapest, nicest, newest, low mileage single owner Toyota Camry/Corolla/Etc you can find. The best cars are the ones being sold by friends/family, so start there after you have the money.

This way you can get a new car without going into debt. The obvious alternative is to get your Charger fixed, but personally I'd opt for a good reliable Toyota and be done with it for a few years.