Hello,
You can use the addBreak method to add line, page or column breaks. Please check this example:
http://www.phpdocx.com/api-documentation/word-content/insert-line-column-page-break-Word-document-with-PHP
To do a pagebreak in a template you need to use the page_break_before property with replaceTemplateVariableByHTML.
About parsing a document, you get the full content using the read readDOCX method. But you can your own template in the constructor.
Regards.