Nope, no upfront costs. If you get through your looking at like $180 security, medical atleast $150, shop around for the RSA and First Aid-there are cheaper companies than St John which is rather expensive. Training school is paid for, its a set amount-minimum wage-as determined by the government. hourly rate is good. Hard to tell what a yearly figure would be. You are guaranteed 80hrs a month-as long as you dont have any leave, which of course is unpaid.
Heres a link to the Agreement
http://www.fwa.gov.au/documents/agre...a/AE881643.pdf-have a look through it and make sure youd be happy with the conditions before forking out the time and cash, (its what i did before i applied.)