To configure the User profile setting for Terraclassifieds got to Terraclassifieds -> Settings -> User profile
Author name settings
Username - choose if you want to show or hide a username in the Author view. Link to author view page is available on a single ad view.
Edit profile page settings
Set required fields - options allow you to control and force the user to enter required fields before adding ads. It means that the user will not be allowed to add adverts if his profile view is not filled in with the information that you as a website administrator require for your website. How do require field settings for a user profile work?