Thread:Project:Support desk/Adding an infobox, index or similar

Hi! My wiki has five categories of pages. To make it simple, lets say that one of these categories is pages about cars while another is pages about bikes. I have made one index page for each of these categories, so that all pages in the category are easy to reach from this index page. Now, I want each page in a category to link to the index. And I want it to do so that clearly marks the page as a part of this category.

Right now, I simply end each page with something like "this page is a page about cars" or "this page is a page about cars". This is a really bad solution, so I want a better one. I'm trying to implement a certain solution, but I'm also open to other suggestions. The solution I'm currently trying to implement is the "infoboxes" that wikipedia use. A box with information and links, to put on the right side of the page.

I tried to search for information on this, both on wikipedia and on mediawiki, but didn't find anything that seemed to solve the problem. I also browsed through the, in case I need an extension to make an infobox. Didn't find anything there either. The search words I used were "sidebar" and "infobox".

On wikipedia I have seen three kinds of boxes I could use.
 * The one I like the most is the "sidebar" kind that includes the "rights" sidebar at http://en.wikipedia.org/wiki/Rights
 * Second, we have the "infobox" like the one at http://en.wikipedia.org/wiki/Wendell_H._Ford
 * Thirdly, we have the "series" kind like the ones as http://en.wikipedia.org/wiki/Feminism

I'd like to be able to make any of these (or some fourth kind I haven't seen yet), but so far I have failed. I copied the templates for the first and second kind from wikipedia, but didn't work. When I add a sidebar, the page simply says ""

So... any advice?
 * What do I need to make a sidebar, infobox or series like the ones at Wikipedia?
 * And is there some other good method to organize my pages?

Thank you for your time!