You only have one password to log on to cPanel (your control panel) itself. This password can be changed by you at any time from the “Change Password” icon within cPanel.
While each addon domain can be given a separate FTP password, they will all share the same cPanel as the primary domain. They must all use the same cPanel user name and password.
Custom FTP accounts may be created to allow user access to specific folders on your account.
Each email account has a separate webmail login, allowing an account to be checked without having to provide access to all accounts.