As SuperTramp83 says there is a difference between privacy and achieving anonymity.
http://lifehacker.com/how-can-i-stay-anonymous-with-tor-1498876762the tor project org offers extensive "explanations"on the matter and what vulnerabilities affects it.
https://www.torproject.org/docs/documentation.html.en https://trisquel.info/en/forum/basic-security-questions https://trisquel.info/en/forum/torify-my-software-updater-and-synaptic https://en.wikipedia.org/wiki/Virtual_private_network https://en.wikipedia.org/wiki/Tor_%28anonymity_network%29 https://en.wikipedia.org/wiki/Anonymous_P2P