1. Please enable membership in Settings -> General menu. http://prntscr.com/obwv5g
2. Please edit "Content On Background Slider" field in edit page. http://prntscr.com/obwvkd
Travelo theme has not social login feature. You can not add social login button in login popup.
3. Please edit page content in edit page. Travelo theme was integrated with WPBakery builder and you can edit/remove those block using WPBakery page builder.
4. You can not remove booking no and pin code in Travelo theme.