How to anonymously and privately purchase Bitcoin through Tor? How can Bitcoin be anonymously purchased through Tor in a secure and private fashion?

My question is related to:


How can I setup Bitcoin to be anonymous with Tor?
Personal information and bitcoin purchasing


but more focused on anonymous and private purchasing transactions.
First of all, anonimity and privacy are two different things. Bitcoin is designed to be pseudonimous - which is close to anonimity, but instead of being completely anonimous, you're linked to your bitcoin address, or pseudonym.
You cannot make a private transaction on the Bitcoin network, but you can try to be as anonymous as possible.

It is possible to run Bitcoin Core as a Tor hidden service, and connect to such services.
The first step is running Bitcoin Core behind a Tor proxy. This will already anonymize all outgoing connections, but more is possible.

More instructions at github:
https://github.com/bitcoin/bitcoin/blob/master/doc/tor.md