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.
tc-sauna_1.0.zip and tc-sauna-child_1.0.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 Total.
Color/Font is very easy process. We have given these options in all sections of customizer. It is a complete image to show you about color and font palette. At a single glance of click you can set the color and fonts of the Headings, Paragrapgh and Buttons.
Every individual section have an option to set the color palette for Headings, Title/Text, Paragraph, Button Text and Button Background depending upon the number of option that are available in that respective section
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.