How can send photos, videos and other materials to a friend?

To attach a song, a photo or a video go to your friend's page, click on the text input field above his wall and then click on "More" you will see the buttons you need there.

Same goes for private messages and group chats: click on the paper clip and select what type of content you want to attach: "Photo", "Video" or "Audio file".
Your search for returned no results.
Try using other keywords, e.g.: "delete profile", "create chat".
Check your request for misprints.