My family has got 11 people.- There are eleven people in my family
Or We are eleven in my family
I'm am the eleventh- OK, but I'm the youngest sounds more natural to me
MY dream is having a wife- My dream is to have a wife
Address- it's not a system we use, so just try to make it clear:
If you're not including your parents, then we're eleven children/there are eleven children in my family would be better.
With the address, I gave the best way I could think of for doing it in English, as it's a system we don't use. I really don't know the French way, but we tend to give streets names not numbers, though New York has streets with numbers. I am living in Cambodia at the moment and here, people use things like No 35 Street 63. Mabye using No or # would be OK.