For rent, if talking about 2bedroom, at least 500 to 700 aud per week, for living, basically 200aud per week for an adult, kids will be around 100per week, but doesn\'t count child care yet, an d your income is importment also
Melbourne covers a vast area with many suburbs, with eastern suburbs being generally better. If you don't have any in mind, you may consider one of the followings:Balwyn, Balwyn North, Box Hill, Blackburn, Ringwood, Mount Waverley or Glen Waverley.
All are easily accessible by public transport (tram/train) and there are good public schools. Being further out, Ringwood is relatively cheaper for rentals:
http://www.realestate.com.au/rent/with-3-bedrooms-in-ringwood%2c+vic+3134%3b+/list-1?maxBeds=any&source=location-search