How do i recruit prisonners? When i tried to recruit they said that i have to pay them a price but did not say what they want. I remember that they wanted stuff like 2k coins for recruiting but now its different.

the easiest way is just get them to "worships you" affection.

you can do this by talking to them, giving them the gift they prefer, and over time from your keeper/ warden.

once they're at "worships you," when you ask them to serve you, they'll join for free.