Part 1: "tar -xf tar -xf gcc-arm-none-eabi-X-XXXX-XX-update-linux.tar.bz2" should probably lose one of the "tar -xf"s.
Part 6: "unfmilaiar"
Part 8: "Proccess"
In what order should the extra information pages be read in relation to the tutorial parts?
The extra information is all linked to from the main parts. The reason it's also on the main page is so anyone looking for that info independently of this particular tutorial might find it more easily.