how to clone page template to be used in addition to the original? in this instance i want to use the homepage as a template for other pages in addition to the homepage.
Yes, the plugin can be removed. It will not remove any content you have duplicated.
Yes, you can just copy and paste content if you want. The benefit of the duplicate plugin is it will also copy any meta box settings such as the Layout / Disable Elements.
NOTE: That plugin only runs on the Backend – it won’t affect your sites performance at all