To get your student visa you must prove that you have the funds to cover your course fees, travel and living costs. Based on rules that are effective from 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 AUD62,222 in the 12 months immediately before an applicant can apply. If you bring family members, you must demonstrate your parents’ or partner’s income is at least AUD72,592.