You mean there's someone else out there into these super rare, amazing, and truly unique birds? I hope you're looking for the true ones, not the Hatchery-bred Turken hybrids.
Well, I've never had them myself, but I hear a lot of things and read up on them a lot. I myself really want to add them to my slowly growing collection of Gamefowl, however, they're not as hardy, and I'll need to be completely prepared in this mild, rather cold and rainy climate.
1.)How easy are they to raise and keep? I hear from people that they often give up on the breed due to its lack of genetic diversity in the US and also because of its cold intolerance. I'd say if you live in a generally warm, or better yet, a hot environment, - Or have a place for it that is usually hot, then you're fine. Otherwise they're not too tolerant of temp changes, windy areas, and cold.
2.)Do the hens fight with other hens(can hens be keep to gether)? Yes they can be kept together, however like a lot of other gamefowl things can happen, and it is best you keep an eye out for signs of disagreement. If they have a good space to roam around, you'll have less issues.
3.)Are they aggressive towards people? Not at all! They're extremely loyal, friendly, and calm. Consider that the breed originates in very poor villages in Madagascar where all people had was their bare hands and little clothing to handle these birds. Same goes for any other gamefowl - They're very much like pets!
4.)Can the roosters be keep together when they are babies? When they are chicks, yes. When they get their hormones coming in after a couple months, no. It goes for just about all gamefowl - If they have room to roam; a free ranging environment, you will have less chances of aggression if you keep them at distanced groups. Otherwise, they will fight to the death.