Hello @sujan,

To set up the featured carousel as shown in the demo go to Admin Panel > Appearance > Customize > Featured Carousel > Carousel Type and Enable Carousel On by choosing the option Static Front Page and Shop page .

Similarly you can manage the Featured Carousel feature from Admin Panel > Appearance > Customize > Featured Carousel > Carousel Options.

Also to set up other sections you can refer to themes official documentation given below:
http://themepalace.com/instructions/themes/clean-commerce/

Hope this helps.

Best Regards!!

Hello @sujan,

The theme has the feature to show the sale price in the product listing page as well as in the single page .

Hope this helps .

Best Regards!!