Noir supports 3 sidebar layouts (left, right, none) and 1-4 columns. You can find these options (and lots more) in the theme customizer.
You can change the sidebar layout for your homepage, archives, search results, posts and other pages by going to Appearance > Customize > General Theme Settings > Layouts.
Just click on each option and select from the drop-down box (the default layout is a right sidebar).
You can change the columns layout for your homepage, archives, and search results pages by going to Appearance > Customize > General Theme Settings > Entries.
You must first select Grid from the Entry Style box.
Then you can select Grid Columns from the drop-down box (1-4 columns). From here you can also edit other entry options.