Custom parent -category page templates.

For each parent-category, I wish to have custom page templates as an introduction to their respective child-categories below.

Each parent-category to have the following…

1. Styled like the front-page.
2. With its very own & separate four featured-images.
3. Each image to be clickable and link to a post URL.
4. Each image to be uploaded via a Ward Image & Text Widget with URL option linking to a post.
4. All four feature image sections to have different background colours.

Please help.