You must train your recruits to level 10 and then you are given the ability to assign them to a den that you took over from the Templars. After you assign an assassin, a mission unlocks.
The only way to obtain cheats in Assassin's Creed: Revelations is to complete the segments 100%. It's easy enough once you understand your objectives for the different "missions".
Stupid Wiki
Yes, but only in short missions
After a couple of beginner missions you get symbols on your map which look like 4 arrows pointing at a dot. You go to that location and there you can recruit assassins. You have to take over templar dens to unlock more recruit slots.
Yeah it increase their rank to make them become real assassins like ezio
All you have to do is level them up by sendin them on missions when you visit an assassin post, or press square (on ps3), X (on xbox 360) while at the viewing section of your assassin post to assign an assassin to a city so they'll gain xp while there, NOTE: not sure if they get xp from being assigned to a city only if you invest in xp for the city or not after it's under assassin control
No this is not part of the game. In the first Assassin's Creed you take control of the Assassin Altair. In the second game you are given the part of Ezio Auditore. Throughout the second game you team up with other assassins to complete your missions, but you never get to control any other character but Ezio.
One way to earn easy money in Assassin's Creed Revelations is by looting enemies and selling their items at a blacksmith. You can also complete side missions, courier missions, and assassinate targets for rewards. Additionally, investing in the city's economy by renovating shops and landmarks can generate a steady income over time.
Cicero's armor. Near the end if the Dark Brotherhood chain. If you choose not to kill Cicero however, there is The Jester's armor on a table near the entrance of the dawnstar sanctuary during that same quest that is not quite as effective but still useful.
Complete "Beat Up" missions.
send them on missions with other assassins, make sure to check if the mission gives good exp and if they can handle it.
complete missions, or go to a blacksmith, tailor, or armory.