For future reference, perhaps for people searching for this thread. Youth Allowance can be a real bitch to get, and I don't blame you for asking before you in, because I would imagine that they would not give you a straight answers and then drag you through so much stuff.
If you are living with both parents chances are you will not get it all. If you are living with one, and they are on very low income, you may get up to $170 a fortnight, but once you earn over about $100 a week they start deducting money.
If you want to move out on your own, you have to prove you are independent. Even if you live out of home centrelink does not class you as independent until you are like 25. You have to earn certain amounts money or prove it is unreasonable to live at home. I don't know how moving to a uni effects it.
Was anyone else screwed by centrelink between end of year 12 and uni enrollment?