I spent most of my late teens and twenties in debt to credit cards and loans - not everybody's idea of prudent financial management but it sure as heck meant that I always had a car and could always pay for repairs, tax, registration etc. It's only in the past 3 or 4 years that i've earned enough money to not really 'need' to use credit.
On the other hand my best mate has never owned a credit card and only ever had his own car for about 4 months until it needed fixing and he decided he'd rather spend his money on CDs and a sampler. The guy's never been in debt and as long as he has his ipod on the bus, he's a happy man!
The third alternative is to be really tight, controlled, anal retentive even and save and set aside and plan every penny. (an ex-flatmate of mine never bought any toilet roll - always stole it from his work, for instance!)
For me you're either like that or you're not. By all means you can become more prudent and careful if you try but I think some folks just aren't built that way.
I'm not like that and from my reading of tiny's past posts, it doesn't seem to me that he is either.
Tiny - have a good think about what's important to you - any car, mini or not will cost money for rego and repairs - it seems, like most of us here, that cars are important to you - that, along with working far from home, means that in practical terms you still need a car.
Seriously sit down and work out how much you'd get for a car that needs work done, remember that it'll be nowhere near how much you paid or have spent on it. Then figure out if that money would get you another vehicle that would be reliable and roadworthy enough to commute to work. Bear in mind that any car you buy still needs rego, insurance etc.
If you can live without a car, then it might not be a bad idea to store the mini until you can get it fixed properly - and get aquainted with the following websites -
http://www.cityrail.nsw.gov.au/index.jsp
http://www.131500.info/realtime/default.asp
If it were me, i'd try borrowing money from a) Parents, b) Credit Card c) Loan.
Good Luck