If you have issues on your registration page with DJ-Classifieds with such error:
Warning Field required: Terms of Service
Go to: Extensions -> Plugins, search for User - Profile plugin and click to edit it
Once editing the plugin make the "Terms of Service" setting to "Disabled"
and Save the plugin.
(It's needed as the DJ-Classifieds registration uses the same core Joomla! registration mechanism which is checking if the required fields set in this plugin are present). Learn more about DJ-Classifieds registration plugin.