To insert section breaks and have different headers and footers for different sections insert a "manual page break" via "insert" - "manual break" - "page break" and choosing the type of section.
The section can also be chosen by right-clicking the status bar at the bottom of the document. It usually reads "Default". This is the name of the section. It can be changed.
A new section type can be defined by clicking the left-most button on the lower toolbar - the button that shows a hand selecting a square. Click the page style icon and then right click to create a new section.
One can set the page number to start counting at any number when inserting a manual break using the above procedure. When choosing a section, the option is given to select a page number. However, it appears that due to a bug, one or more blank pages are inserted if this is done.
There is also a "insert" - "section" option which has a page numbering feature in the "footer" tab.