Mafia wars finding other people?

I just started playing Mafia wars and was wondering how I can find othe rmafiosi. When I view other profiles the only choices it gives me are to attack, sucker punch, and add to marked list. Is there a way to add more people through the game, or can I only add my friends. I was also wondering where I can find other families. It gives other people the option to join my family but I can find a page just for my family. I have only been able to find individual stats, and those don't say what family my members are apart of.