Yes mlt, Shannon &fam. have PR and are planning a move to Sydney, - thread on housing branch.
Shannon It is probably best to preface a new post with just a line to let people know any background.
As mlt has said, it'll probably be best to know where you actually will be living and I doubt you will get much of a response other than something general sent from any primary school to you whilst still overseas.
You've moved the move right up now have you? and the situation re government primary schools will be that once you're resident you'll have a right of enrolment to a state school that serves your residential area, and the same with secondary schooling.

There could even be references to it on Department of Immigration and Citizenship as there is a section there covering general living matters - never had a close look actually.
If you were thinking of a private school, then that's another matter with substantially higher fees but quite a few have waiting lists or a requirement for enrolments years ahead.