Where can I access the original, Satoshi written Bitcoin code?
The Bitcoin client has been hosted on GitHub for a while now. It's very close to what Satoshi initially wrote. Here's the first commit dated back to 2009: https://github.com/bitcoin/bitcoin/tree/4405b78d6059e536c36974088a8ed4d9f0f29898

You could also browse all the commits from way back: https://github.com/bitcoin/bitcoin/commits/master?page=151

Some other research points me to the actual first email sent to the cryptography mailing-list by Satoshi where he actually delivered the 0.1 version: http://www.metzdowd.com/pipermail/cryptography/2009-January/014994.html

Here's the direct link provided by Satoshi but it doesn't seem to work anymore: http://downloads.sourceforge.net/bitcoin/bitcoin-0.1.0.rar

Googling a bit I found this, which is what you're looking for: https://bitcointalk.org/index.php?topic=68121.0