EDIT: I disagree with Pixon, don't just give it a go.. It's ridiculously silly.. People who follow their parents pressures, refusing to make their own choices, really aren't living life properly. Do what YOU want to do!
--
Dimi; Sorry, but if you want "nice cars" and "hot girls" medicine is probably not for you.. You will be working very hard for a long time and wont be making a decent amount of money for ages.. 6 years uni (UQ) + internship + residency + specialist training = 7+ years added, etc.. Constant exams, lots of pressure/stress..
You will probably not like medicine if you don't want to do it and may have a terrible life, or it could just be ok, but there would be something else you want to do more so dont settle for "OK" just yet - you are young. Also medicine is a life choice not just a job, it will consume you and make you not have time for getting "hot girls".
Go with something you like.. not medicine, please.. Go live life with your passion, medicine is clearly not for you.
UQ is not better OR worse than monash, it's just as good. You do have to do the 2 years undergrad science before you start medicine (a grad course) at UQ which is 4 years afterwards - its how the course is.