You can enable the header topbar from Theme Options => Header => Topbar http://d.pr/i/IamE2f
The social icons for the header are managed from Theme Options => Header => Social Icons Enter the URL for the desired icons there.
Call to action buttons can be created at Theme Options => Header => Featured Buttons
Now to add them to your Topbar move to Theme Options => Header => Topbar. Here you can see 2 blocks of options, 1 is for the left side of topbar and other is for right side of topbar. http://d.pr/i/PeLbAC
Move the items from disabled to enabled to add them to your topbar, drag drop them to sort their position in the topbar. See quick demo https://d.pr/i/DSklVX