The template package you have downloaded consists of several folders. Let's see what each folder contains:
Screenshots : contains template screenshots. Not for production.
Theme : contains WordPress theme files.
sauna-lite_1.2.0.zip: this folder contains all the necessary files for the theme.
license.txt : contains license details.
readme.txt : contain information about theme images path and font use and usage scritps.
Template installation is very easy process.
Your second installation option is to upload the theme via FTP. For this method first log into your site via FTP and browse to your folder located at wp-content/themes. Unzip the theme file you downloaded and upload only the extracted Total folder to your server.
Next log into your WordPress site and navigate to Appearance Themes to activate.
Once you view your site after activating the theme, You will see the index page with the latest post. Now you will need to setup the home page template to show all the demo section on your front page.
In order to proceed with Slider Setup.
Go to Pages All Pages Home Edit
Go to Edit Set Feature Image
Go to Appearance Customize Theme setting Slider setting
Select slider image page Save and publish