Hi
If you all got the TRV, it is better for you to move in Toronto first, then apply for your study permit ( Full time only) and your spouse work permit too. It is pretty straight forward from Canada. But you will also have to demonstrate that you have enough funds ( Even photocopies of bank papers) to pay for your studies as well as living expenses and a return travel ticket when you are done with your studies. As for the child, at this age, i don't think the child will need a study permit. All you have to do is move in, get settled, apply for your study and spouse open work permit, it will take a month approx to get those permits... Then, both apply for a province residence card, you pay approx $12/ each, this will enable you to have a valid provincial ID, and permission will be granted to admit your child to school. As for your spouse, she will then need to apply a social insurance number to get a job. It seems a lot, but it is simple and straight forward. After each step, consult Canada Visa forum again to guide you through all the steps. I hope that info can be useful to you. Best of Luck!
After one year you may be eligible to apply for Permanent Residence, for that be patient.
You really should read
www.cic.gc.ca about study permits. The OP can't apply in Canada for a study permit, they either have to apply on entry to Canada if they are eligible or an overseas office. If they require medicals, they can't apply on entry. They should really be applying through Sydney Australia. They will have to show funds to cover the first year tuition and $20K for a family or 4 for 1 years living expenses. See:
http://www.cic.gc.ca/english/resources/manuals/op/op12-eng.pdf page 28.
PMM