Cant find how to get the api key

been here
and here
Cant see a Create new app
and here
and here
This is soooo complicated, I just wanted to put a facebook like button on my wordpress blog

not anywhere is there a get a key button or any logical further steps or I am missing something from somewhere?

Also when I went to facebook com I had to access apps through my personal page rather than the page I want to connect to via my wordpress site.

Site is:

Facebook page is:

Do I have to register as a developer .. so confused! (: