Go to the freeroll forum on the main page, right under it you will see a subforum titled "Freeroll Passwords". open it and you will find each game listed. Passwords are released anywhere from 1 to 4 hours before the game begins.
No, Freeroll passwords are open to all members regardless or post count.
Buy-in passwords require 15 Quality posts.
There will always be new people to the forums asking where to find a password, please welcome them and help them the same as you would wish to be others to treat you.