I recently had to do this. Drove an unregistered car from Sydney to Brisbane. Had to get a blue slip in NSW ($57), take it to the RTA and get an Unregistered Vehicle Permit ($23ish), drive to Brisbane ($150 petrol + smokes + Red Bull), get CTP (I accidently negated this step as the info I was provided with was incorrect), drive to get safety certificate ($90), go to TMR and register vehicle ($400ish for 6 months incl CTP).
Hope that gives you a better idea.