I just got a loan at 19 and i got $8000, part of that was used to pay of my credit card and the rest for a car. I ended up buying an R31 silhouette, as said you gotta take into account condition of the car and costs to get it running, i've had my car a month now and its still not on the road due to fixing parts etc. I wanted a 32 as my first car but ended up with the 31 due to the fact there were no 32's within my price range, and as said, insurance will be a bitch to get, im paying $1800 a year but its not too bad considering the mods on my car etc. If you did have $15k all up, you would really only have around $12k to spend on a car, as rest goes towards stamp duty, insurance etc etc. I would expect at your age to pay up to $2500-$3000 a year on insurance, with a huge excess, so definatly take a long hard think about it before you decided, as said we dont want to discourage you, but its best to listen as we've been there and have experienced it first hand.