Hi,
hmm, this is more of a question about the theme itself rather than WPAdverts.
The menu items (in the Classifieds section) you can add manually from the wp-admin / Appearance / Menus panel, WPAdverts does not have an option to do that.
If you additionally want to have some buttons on the Classifieds page, then you would need to go to wp-admin / Pages panel, edit the Classifieds page and add there the links you want to have above the [adverts_list] shortcode.
In WPAdverts the links:
– Search, Browse should point to page with [adverts_list] so you only need one of them
– Renew, Edit should point to page with [adverts_manage] shortcode
– Place should point to page with [adverts_add] shortcode
– Reply, Show not sure what this should do, in WPAdverts user can reply only from the Ad detail page so this link should not really be in the menu.