I'm trying to disable or remove some Cpanel modules from the Cpanel frontend for hosted users. There is some things I don't want users having access to such as DNS Zone Simple/Advanced editor, virus scanner.

Also, how do I enable Mailing Lists or any module for the Cpanel Frontend?

To add and remove items in your cPanel, you would need to go to WHM and use the Feature Manager. Just uncheck the items you do not want to appear in your cPanel frontend.

WHM has a feature manager you can use to enable/disable certain cPanel features.