Thanks for reaching out.
1) It depends of which image, is it standard image or image element from the builder, and how does the image implemented? It could be done through CSS, example add this to Theme Options > CSS
Then your image should have class
<img class="float_right_image". I assume you're only referring to standard image content of a post, then adding that CSS
2) I think that would require a plugin but I'm not sure which, or custom development. What you need is a popup with pinterest integration which currently not available feature of the theme and builder. It's a complex one so you may need to contact a developer.