I don't want the sidebar
Template exists for this:
The 2012 theme for WordPress is a fully responsive theme that looks great on any device. Features include a front page template with its own widgets, an optional display font, styling for post formats on both index and single views, and an optional no-sidebar page template. Make it yours with a custom menu, header image, and background.
Admin Dashboard>Settings>Discussion>Default article settings>uncheck all>Save Changes
Remove from existing Page (if created prior to last step, this is a post based option record kept in db):
Admin dashboard>Pages>All Pages>Hover Page Title>Quick Edit>Uncheck 'Allow Comments'.
get rid of the Search function
Disable search: Do you just desire to remove the search box?