Hi @Anhuai - you definitely bought the right theme, you just need to select the Tinyfolio demo to import that specific sample data.
Hopefully the video linked in the above comment from @charlie4282 helped but just in case here are some easy instructions. First, go to your Envato downloads page and choose the “installable wordpress file only” for the Total theme (sometime people try to install the “All theme files & documentation” which results in a missing stylesheet error). Install & activate the theme on your WordPress site. You should see a “Theme Panel” on the left-hand menu in your dashboard. Hover on it then click on the “Demo Importer.” From here you can select the Tinyfolio demo (or any of our other demos):
The importer will prompt you to install any required plugins as well as provide all of the same sample data you see on our live demo to help you get started. If you need any other assistance please us these instructions to open a ticket - we’d be happy to help