Carlo,
No problem for the questions, that's why this forum area exists
1) For Kunena, you have full control of the profile and avatar import from Facebook into the user's profile. Social widgets like the Like button can easily be added to the template files for Kunena using the {JFBCLike} tags.
2) Yes, the FB Like, Twitter, Google+, and LinkedIn social sharing buttons can easily be added to anywhere on your site with the tags you mention. Additionally, they can be automatically added to all Joomla articles and K2 content using our Social Configuration options.
Hope that helps, but if you have other questions, just let us know!
Alex
Two questions
