Typekit explains on there site how to install a font. Login, goto the kit editor and click [ embed code]
<script src="//use.typekit.net/YOUR_CODE_GOES_HERE.js"></script>
<script>try{Typekit.load();}catch(e){}</script>
After you've done that:
If you want to use Typekit in your CSS, click the “Using fonts in
CSS” link in the selectors area of your kit to reveal the appropriate
font-family names to use. Once you’ve included the Typekit embed code
in the of your documents, you can add these font-family names
to the CSS rules in your own stylesheet:
h1 { font-family: "proxima-nova", sans-serif; }
http://help.typekit.com/customer/portal/articles/6859-working-with-css-selectors
Using the font-family Names in Your CSS