I need a specific gallery.

I need a gallery with:

1. thumbnails on the bottom or on the side.
2. when I click the thumbnail it displays a different photo.
3. this different photo will have a caption where I can put:
a. prices.
b. a description.
c. goto shopping cart button.

I want this gallery to do two functions. (1)I need to sell photographs and digital art online. (2)My wife does photo restoration (she has been doing it for almost 20 years) and we want to display the work she does. To do this we want the viewer to be able to click on the thumbnail and display a before and after photo.

To get a better idea of what we need goto cjmgraphics.com. I know the website is way out of date and that is what we are doing now.