Once you have setup a copy of WordPress, there are two ways you can go about installing the theme:
1. FTP Upload
Unzip the download and upload the theme directory /Mogo/ into your WordPress themes directory /wp-content/themes/.
2. WordPress Upload
This is definitely the easier route for most. Simply navigate to Appearance > Themes > Add New > Upload Theme. Click the ‘browse’ button and locate the still zipped theme folder. The theme will be uploaded and installed in a matter of seconds.
After you have installed the theme successfully, you should have active the theme.