As many as can comfortablly fit!
You can create as many families as you want, however you can only play one household at a time, unlike Sims 2, where you can control the whole town at the same time, by going to different households.
No. Your family are the people you're related to. The household is the house that you live in.
it means they live in the same house
Yes you can.
Yes and no. Many "old-fashioned" families still live this way, but in today's families, it's usually because of money.
Not if they are trained correctly.
no they have families and so they have to live under different roofs
they can but you would rather not because they would fight alot
integration of schools families of the same races live in same neighborhoods
No. I had a friend who shared the car insurance with me and he used to live in another county.
they lived with there family and some other families in the same tribe.
You can certainly talk to your insurance broker about it, but I believe that it would be simpler for this unrelated person who doesn't live in the same household to obtain his or her own insurance, rather than being added to your policy.