This is in the wrong section, you should go over to 'coding help and templates'. To add stuff, you'll need to either know or learn html. The easiest way to do it would be to find my thread in the coding section 'a very simple template' and use that in the 'custom html' box on the edit page section, then use a little html knowledge to add buttons. You can upload webpage (html) and image files to Drunkduck in the 'files' section when editing your comic, so making a page shouldn't be a chore if you know basic html coding.
You put up your questions in the wrong forum, Author_Ninja. You need to look nine and ten forum categories below this Tips and Tricks forum category, because this forum is mostly about how to make your art work look a little better and other things along those lines.
The two forums you are actually looking for are called [Help! How Do I...?] and [Coding Help & Templates]. Those two forums specialize in answering exactly the questions that you just raised and you will actually find a sticky or two at the beginning of those two forums that probably have exactly the answers to most of the questions that you are asking.