HELP!!! Creche?Kindergarden?Nanny? (Paris)

Hello Expats,

I have a question about costs and administrative issues concerning childcare. So, please, if you have children or simply know how this works in France tell me:

1. Since what age does a child have a right on a place in a kindergarden?
2. How to get this place?
3. How much does it cost?
4. Are there private kindergartens?
5. How much do they cost?

Maybe some background info may help: My son is almost 2 and we live in 92.

Thank you!

Olga