We need a page like LIferay's Documentation page, with a TOC and prev/next navigation. I was under the impression that this would be part of the under the CMS portlets but nothing there jumps out at me. Is this possible with Liferay CE?

Below is another example of what we want:
Book of Vaadin

Liferay is just using the Wiki with <<TableOfContents>> tag to display a TOC.

I think navigation arrows are just links on images.

What did you have in mind exactly?

Both are custom portlets.