Hello,

1) Sorry there is no such option to use custom link in the brand carousel. It requires customizations to redirect this specific brand to another external website. This is beyond our limitations and out of our scope.

2) If you want to remove the tabs you do not need to use CSS code, In order to remove Description of some products, just leave the long description empty and this tab would not appear. There are no other option by Woocommerce.

To hide the reviews tab you need to disable reviews in Woocommerce > Settings > Product Tab > Inventory.

Best Regards.