Normally you can use all basic function of Revolution Slider plugin you saw on demo site.
However you have to purchase separated license for Revolution Slider if you want to use additional features ex. auto update feature of the plugin. When you purchased theme, plugin is included but it’s purchased code for theme
There is no need to buy Revolution Slider pro version to create all pages you saw on our demo sites. We are using basic version of Revolution Slider across all demo pages too.
We will also provide a regular updates of Revolution Slider plugin through our theme updates as well.