Upgraded to v7 & lost my search box, icons and submit button

I’ve just upgraded to DT v7 abd have lost my search box that what there by default when I set up the theme…..as such I have no idea right now of how to put it back in place. Specifically I’m looking to re-instate the search box, social icons and Submit Listing button located just below the sites logo and main navigation area as per attached image.

Whilst I’ll keep looking here, can anyone give me a head-start / point me in the right direction to save me some time??

Many thanks!