Hey Jamie,
For #1. Regretfully, this is not possible in X without customizing the PHP templates responsible for displaying the areas you mentioned. If you know how to code or are a WordPress developer yourself, you can learn how you can customize our theme by reading our Customization articles available in our Themeco Docs. Specifically, start here: https://theme.co/docs/best-practices.
If you’re not a developer or know how to code, you need to consult with a developer to customize our theme because we do not provide customization service as part of our theme support nor we can teach how to code.
For #2. Are you referring to the horizontal line in the following screenshot?

If so, our theme doesn’t have an option to remove it so you’d need to learn CSS and also learn how to use the browser’s element inspector in order to override that part of the theme.
If that is not the line you’re referring to, please provide the URL of the page and a screenshot of the line so maybe we could point you to an option you can use.
For #3. This part is powered by WooCommerce and not our theme so I will refer you to this WooCommerce Product Category documentation: https://docs.woocommerce.com/document/managing-product-taxonomies/. If that is not what you need, please contact WooCommerce support.
Thanks.