After you Activate this theme you will see message in WP admin panel that you must install required plugins and can install recommended plugins. Don't worry - all plugins included with theme and you don't need to download or purchase something.
Click Begin installing plugins in this message
You must check all required plugins and can check recommended plugins (we recommend it to use, but theme will work without this plugins too):
Select Install in dropdown Bulk Actions menu and click Apply
You should get All installations have been completed message with installed Plugins table below it
- - You need to install this plugin before to import the demo data.