Hello,
1) To get 3 products per row on category page go to Theme Options > Shop > Shop page Layout https://prnt.sc/n4zei5
Products per row on main Shop page you can change via Appearance > Customize > WooCommerce > Product catalog http://prntscr.com/n5pm02
2) Here is a screenshot of “Products style” settings – http://prntscr.com/n5pmoq
3) Variation swatches – http://prntscr.com/n5pmxu
4) http://prntscr.com/n5pn51 > http://prntscr.com/n5pn97 On your site, it is “Shop Banners below the products” static block – http://prntscr.com/n5pnrd
5) This widget http://prntscr.com/n5po58 looks different on your site, because of settings, please check our demo – http://prntscr.com/n5poga
6) To be able to see “Sort by rating” widget in the sidebar, you need to enable reviews and get some ratings for products. Woocommerce > Settings > Products > Reviews > Enable Reviews and http://prntscr.com/mztt83
If you need any further assistance, please write your questions one by one.
You can use such screenshot maker as Lightshot https://prnt.sc/
Regards