The Content plugin is for just that, content. It won't activate in Virtuemart and there's not a current way to do that. We are investigating a better way to integrate our social buttons with other extensions, but that won't be available for some time.
Until then, you'd need to modify your Virtuemart template file(s) and add the {JFBCLike}{SCTwitterShare} and other social tags wherever you want them to display.
I hope that helps answer your question, but if you need anything else, just let me know.
Thanks,
Alex