The costs can be high when you add it all up. I will try and give you a few, but remember, it depends on your lifestyle.
1. Rental can cost from 20000 all the way up. This will be expensive as its on the beach. 20000 will get you the basic.
2. school is around 10000 per month. There is an english school in floreal called alexander high school for kids between 4 and 10 i think.
3. 20000 to 30000... maybe more if you eating out and.
4. short term car rental can be around 1500 a day, but that is short term. maybe half that or less if you want to get it for like 6 months or year.
5. Full time maid is around 4-5ooo a month, that is 9-5 mon to fri. live in maid is not common here so not sure.
6. French and creole are the main spoken language, but most people can speak english.
7. Not sure. The closest good ones i know about are flic en flac and grand bay.
You could try these guys if you want.
www.mauritiusrelocationservices.com
They do whole packages or help with just a few things. If you want help with something specific, you will get a real personal touch with them.
Hope this helps
http://www.islandinfo.mu