Finally going to do this!

So far have everything removed and ready to start & have the complete kit bought.

Folowing the guide on Driver,
http://www.bmw-driver.net/forum/showthread.php?t=20821


Just a few questions,

- I need extra pins for dash cluster.
If I get a blue or white dash cluster connection from another E36 (To extract and use the pins in mine)
How are the pins extracted and is it possible to extract them leaving the wire connected so I can simply join on another wire?

- Guide says, 25m-30m of 'Assorted equipment wire'
What exactly is this? What I do I ask for and where can I buy it?

- Code Function,
Is this all it does 'Press code button then input a 4 digit code to start car' If so can I get away without it?