Generate Backlinks
I think the only way to have Hugo generate backlinks to a page is to include a partial that loops over all of the content files.
Hugo: New Content
To create a new content file, simply run hugo new <path> <options> from the root directory. All of my content is in the content folder, so this file was created by hugo new content/garden/hugo/new-content.md.
Hugo: Sections
A section is a top-level content directory, or any content directory with an _index.md file. A content directory with an _index.md file is also known as a branch bundle. Section templates receive one or more page collections in context.
Hugo: Content Type
A content type is a way to organize your content. Hugo resolves the content type from either the type in front matter or, if not set, the first directory in the file path. For example, content/blog/my-first-event.md will be of type blog if no type is set.