This functionality is build in into a separate plugin ( named: Typekit for Redux Framework, by develoved ) which is bundled with the theme and can be installed easily through the required & recommended plugins installer ( Appearance -> Install plugins ).
See Installing required & recommended plugins for more.
To create a Kit, check out this link. Once you have created a kit, you have to get the Kit's ID. Launch the Kit editor and click the 'Embed' link near the top right corner: On the modal box that pops up you can see your Kit's ID. Copy it down.Enable the Typekit module and enter your Kit's ID into the Typekit Kit ID field and hit the Refresh & show kit fonts button.
If you don't hit the Refresh & show kit fonts button the changes to the font list won't take effect.
- You have correctly added your website address to the allowed domains list in the Kit's settings
- You have published your kit
- You have given it some time to publish, or propagate changes to the typekit servers
If you are having issues with FOUT (Flash of unstyled text, the text is shown briefly before the font has been downloaded), you can enable this option and reveal the page only after the font has been downloaded.
After you have set-up the kit in the theme's options and saved your changes, do a page refresh and go to the Styling->Fonts settings section. Open any of the Font selector dropdowns and you should see the Typekit fonts from your Kit!