Hello
could you please tell us if you have imported any demo content ? since some of the section requires custom post types for the content you will have to add them in slider, team, testimonial, faqs etc through dashboard.
if it is not the case and you have added the content in the custom post types as well and still those sections are not working then could you please send us your website link along with your wordpress username and password? send them on [email protected] and we will check the issues there.
Thank you