Android GTalk, Chromium Gtalk, Gmail Gtalk - how can i send files such as image, music, video clips like whatsApp?
Google Talk doesn't have any of those features. It's meant as a complement to Gmail, and it's intended that if you want to send files or persistent things to your chat partner, you'd email them.

If you want a chat system that has all the features of WhatsApp, why not just use WhatsApp?