There are many websites providing information on living in Australia.

These few are useful:
http://www.australia.gov.au/information-and-services/education-and-training/international-students
https://www.livingin-australia.com/
https://www.border.gov.au/Trav/Life
https://www.studyinaustralia.gov.au/english/live-in-australia/living-costs – this is a good site identifying the costs of living in Australia.
https://www.internationalstudent.com/study_australia/living_in_australia/
If you have a school aged dependent, you will be required to pay full fees if enrolled in either a government or non-government school.

Check the government’s education website in the state you will be living in.