Im in exactly the same position, 23 looking for a 2nd hand car. Was thinking of getting a sentra 140i. Either that of a golfOr a 98 astra.
The thing with me is that I don't know a lot about cars. Let's say I drive on the highway or where ever and the car stops and breaks down, I wouldn't know what to do, I wouldn't. So I don't really want an OLD car but at the same time I can't afford new car so I have to settle with a second hand car, but the car must be reliable so as not to give me problems or breaks down or something.
For me a Toyota Yaris would be my ideal first car, I read from a website that it's fuel consumption on average is about 5.5 litres/100 kms for a T1 model, and fuel consuption for most cars are about 8 litres/100 kms. But I can't afford a Yaris so for now a Tazz will do.