Full Width or Box Style Site
If you see the NewsPress Demo, you can find some Examples of Full Width Site, Box Style Site etc. You can do these easily from the NewsPress Options controlling the Values as per you requirements.
Number of Columns and Style
You can find different Number of Columns and Styles for Heading, Sub Heading, Special Categories, Categories, Category Pages etc. in the NewsPress Demo. You can do these easily from the NewsPress Options controlling the Values as per you requirements. This is just an Example how you will do those.