Go to Insight Core page. Here you will find Install Required Plugins
You can install and activate each plugins there or you can go to Insight Core > Plugins to install and activate all of them at once. Simply check all of them (or all of required plugins and some recommended plugins you like) and from the drop down select Install, then hit Apply.
When finishing, it should look like this:
Required plugins: Insight Core, Redux Framework, WooCommerce, Visual Composer, Revolution Slider, Vafpress Post Formats UI
Recommended plugins: YITH WooCommerce Wishlist, YITH WooCommerce Compare, Contact Form 7