You must prove that you have the funds to cover your course fees, travel, and living costs to get your student visa. Based on rules that came into effect in February 2018, you must prove that you have funds as indicated by the government to cover your living costs. This does not include your tuition and travel costs.
If you have dependents, you should prove that you have the funds to cover their living costs, including school fees for your children. The other option is to provide evidence that your spouse or parents can support your study and stay in Australia and that they earn at least AU$60,000 per annum.