The theme already provides a full version of Visual Composer and Slider Revolution.
I’m not allowed to sell a licence for these plugins inside my theme so I can’t give you one.
You need to activate the plugins only if you need auto update and support for the plugin authors.
You have to purchase Visual Composer and Slider Revolution on your own to get a licence key.

Any time the theme is updated, you will find the latest version of the plugins in the includes/admin/plugins folder