Welcome to Fort McMurray. A number of people had the same questions as you did about moving to Fort McMurray, check out newcomers/
boards, you will find a lot of good information there.
Good discussion about best place to live in the city: real-estate/what-the-best-area-fort-mcmurray-t291.html
I believe your children will be able to go school here.
A discussion about schools newcomers/best-schools-and-childcare-fort-mac-t5575.html
Cost of living is high here, your rent for a family will be in 2-3k range plus food in 1-2k range