HT2518 Switch 101 para7

Not quite sure I understand what password is being asked for in para7 of the above migration action.

I am planning to migrate from a Windows XP sp3 to a Mac mini .

The Mac mini will be brand new - when I switch on will I be in administrator mode?

The planned set up is an ethernet cable between both computers to form a "mini network"

Assuming every application that isn't needed is "off" and I have the Migration Assistant opened in both computers which of the computers is "in charge"?

On my Windows PC I am logged in as administrator but I have no idea what the password is - how can I find out - assuming I need this?

Also the writer uses "password" and "passcode" are they the same thing?

These are probably daft questions to ask but I am determined to change to a Mac and would very much like to do it myself.

Any hints or useful forum(s) pointers would be most appreciated.