I was wondering if it is possible to get rid of the sidebar completely so that my photos can expand into that area.
I guess I am just trying to activate the full width template, but not quite sure how.
I see you've already added this to hide the meta info on single posts and pages:
That hides just the meta info part. If you were to add something to the Appearance → Widgets → "Sidebar" area, then that stuff would fall over and appear below the main content area and look out of place. You can choose to hide the sidebar area or just remember that if you put anything in it later, it will show up below the content area for posts and pages and you may need to readjust spacing at that point.
Here's an example of hiding all the right sidebar things and also expanding the content area to take up that space for Suburbia theme single posts and pages:
This is a slightly separate issue compared to the original post for this thread, so if you have further questions, please start a new thread. :)