@ Tran:
Any suburb in the GTA would be suitable. Many people live in the suburbs and commute to downtown Toronto for work. Obviously housing in downtown Toronto would be quite expensive, but if you have kids you might not want to be raising them in the city anyway. The further away you live from Toronto, the cheaper it gets. My parents know some reliable housing agents who were from Singapore that would know the areas in better detail if you need some referrals.
There are no "good" schools - the schools are not ranked like Singapore where they RGS is #1, RI #2, etc. Public school is public school.