Newbie question about module tags in template

[katiedid]

hey guys, I'm SO pleased with this CMS and am so grateful for all your hard work.

I am trying to make a template for a private school site and want them to be able to expand their functionality as needed. I'm trying to make a 3 column layout and make the third column one for photos/captions, blocks of content, a calendar, login, etc. but I want to add several modules in that column...can I do that?

If I have a div with css styling can I add multiple cms module tags within the div tag?

Also, does anyone have an idea off the top of their head which module(s) would be best for allowing a user to easily add an image and a caption to that third column?

many thanks for your response and patience with the new kids.