In Metaboxes “Layout Posts” you can choose the post layout. The post could be fullwidth, with the sidebar on the left or the sidebar on the right. Be sure that the “Layout Posts” is checked in your Screen Option of the post ( top left of the post).
If you choose the layout with the sidebar you must set the sidebar to display in “Sidebar Settings” ( See how in the next Options Post ).
In Metaboxes “Option Post” you can set the “Header Setting” and choose the header image. You can also select in the “Color Settings” the main color of the post ( important if you want to display the info bar of the post ) , the “General Setting” of the post like the Title of the post and the info bar and associate sidebar in “Sidebar Settings”.
See the “Options Page” video here which has the settings very similar.