Some idea of random costs, off the top of my (exhausted) head. (Disclaimer: I am in an expensive part of Frabce. But not sure that affects general costs all that much...)
School lunches in my town (have just gone up a lot as right-wing mayor was elected in last municipal elections) maternelle: 2e60 primaire: 3e00 per meal. Haven't figures for collège.
Mobile phone contract w SFR around 15-25 euros/mth and AFAIK you still have to commit for a long period (12 or 24mths). Supermarkets do not offer mobile contracts. Mobile phone costs are notoriously high here, and there is a sort of unofficial agreement between operators to keep things thus, regularly denounced by consumer protection bods.
Phone/internet (for boring and annoying reasons, I am with Orange and they are, I think, the most expensive): a shocking amount. About 35e/mth for line rental (don't use that phone, but need to have it to have a phone line, IYSWIM) and then about the same again for Internet/broadband access. Has just gone up because of VAT changes.
Electricity: depends on type of heating, etc. When we had electric heaters in last rented house, which were ancient and house poorly insulated, we paid c100e/mth.
Taxe d'habitation/foncière (bit like council tax) depends upon type of accommodation, area, etc., so v hard to say what you would pay.
Water: varies from town to town, I believe. I can look at our recent bills if you like, but can't quote a yearly/monthly figure w/o checking.
Teaching English: if you are to be working outwith éducation nationale, you need to be canny. Many employers (such as Chambres de Commerce) pay a pittance.
Teaching within éducation nationale needs a whole other thread.
If you are thinking, even vaguely, of setting up a business based in France, I'd advise you to get professional advice as to how much you'll pay in "charges", as it can be a surprise for anyone unaccustomed to the French system. And the more you earn, the more you pay. DH works in a "profession libérale" and his URSSAF and other contributions just keep rising. He paid 1200 euros in URSSAF last year and has received details for the coming year: 4000 euros. That is huge in percentage of income terms. He was told when he started out that in his profession you just can't afford not to keep making more money each year, as your contributions seem to inexorably rise. He mentioned a client today who has just had a bill from her "caisse de sécurité sociale" of 12000 euros for the coming year. Yep, all those zeroes are correct.