Here I will show you how to take off HDD from radio unit in Toyota Avensis in other cars it can be a little different to take out radio, but rest of the tutorial will the same.
You will need long screwdriver as well as 2.5" PATA (ide) to SATA converter - IT MUST BE 2.5"!! with 3,5" will not work! (you can buy one here!)
Software to bypass the HDD password you can find here: http://hdat2.com
Password to put in this app: 00004956414e57414e4953494100000000000000000000000000000000
on the end its 32 x 0