What to do?

Hey guys, Im just wanting everyones opinion on what I should do in my current situation. I have an EA Falcon atm, but being a student, im not sure that I will be able to keep the car running (petrol) for very long when I get my license.

Im thinking about selling the Falcon and buying a smaller car like an Escort(if I can find one) or Corolla etc.

It does seem to be going through alot of petrol lately, not sure weather that is because of the price of petrol or something is wrong with it. It is also currently unregistered.

Another thought is get it fixed (if problem exists) and see how things go, or sell as is, or fix and sell.

Also, the car does have sentimental value, so im not really keen on selling.