Try going to WP admin > Settings > Permalinks. Just visit the page, and then try those URLs again.
If it doesn’t work out try saving on the Permalinks page ( don’t change anything, just save ).
Try adding the class “col-md-9” to the footer and also adding float:right; to it.
As for increasing the main area and making the sidebar smaller, change the class on the sidebar to be “col-md-2” and the main to be “col-md-10” ( change it on the footer as well )
