Drop Down Information Boxes

For the web site I am "renovating" I would like to have a list of services and when clicking on each service a drop down information box appears.

The company director described what he wanted as:

"I also would like where client clicks on restoration services that there be another step so each one can be highlighted and then a pic and description of each one can follow rather than at present where it is just a list of services."

I haven't been sent any photo's yet but I think I can see what he would like.

This is the page I am updating : Restoration Services

As a beginner this is a quite a good challenge because I can see so much of the site that needs doing but there is a the problem of not knowing how to do it all so very much a learning as I go along process!