1) Classic mode means that you switch to WP editor without Gutenberg (means simple HTML editor). Use WPBakery backend editor http://prntscr.com/un4hm3 to create the content of the page if you choose the WPBakery as the main builder of your site. You can disable the Classic WP editor if you want in WPBakery settings http://prntscr.com/un4iaf
2) Elemento and Elementor Pro are 2 plugins. Our theme supports the Elementor Pro but it does not come bundled with our theme and we do not mention that Elementor Pro version comes bundled in theme description! Actually, we would like to include it but unfortunately
Elementor Pro plugin developers do not allow to include the Pro version to themes and do not have any special dev license. So, if you want to use Elementor Pro you need to buy an individual license.
At the same time our theme comes with a number of additional Elementor elements http://prntscr.com/un4nkj
Keep in mind that we would recommend you to choose one of the page builders and use it because 2 builders will slow down your site.
