Please find you answers below
Yes
Into the social wall... can you delete a message if you are an administrator, or the user can delete his own post?,
Do you mean Facebook Like or ? If Facebook like is in question then Yes, but you will have to implement it by your self.
there is a way to include a "like" option or something like that
When you upload something to Wall you will have a FileGallery module displaying the post attachments with thumbnails, I'm not sure if this is what you want or not ?
there is a way to include a "like" option or something like that
Regards