Once you have installed and activated our theme you will be prompted to install required and recommended plugins. Just click the link to begin installing plugins.
Next, check boxes to select all the plugins you want to install, select the bulk action of install from the dropdown box and then click the button to apply.
Select the plugins you had installed, and then apply the bulk action to activate them.
Finally, you will got a confirmation notice that your plugins were activeded.
Video tutorial: Upload & Install Theme, install and active required/recommended plugins : Video Tutorial