Hello, @ericleestudio,
1.. Simply go to the Dashboard >> XStore >> Theme Options >> WooCommerce >> Single Product Builder >> Request A Quote there you will be able to set the settings content of it as per your need from the available options theme have.
2.. Simply go to the Dashboard >> XStore >> Theme Options >> Header builder >> delete Newsletter element from the header content, for example – https://gyazo.com/4e88fe345b18750e31370f6c464bcb74
3.. Simply go to the Dashboard >> XStore >> Theme Options >> Header builder >> Top Header there you will be able to edit it as per your need.
4.. Here is the complete guide about this: https://xstore.helpscoutdocs.com/article/110-sales-booster
5.. Simply go to the Dashboard >> XStore >> Theme Options >> WooCommerce >> Shop >> Shop Page Layout there you will see the option “Shop Page Banner Content” edit/disable it as per your need.
Regards 8Themes Team.