1- it depends on what operating system you are running. It wont work on 5.7
2- superoneclick is outdated, you want to use aroot if you are still on 2.6
3- if you aren't then you need to look in the Hacks and Rooting sections to find a link referening to Tenfar's method of rooting at XDA
4- the 32/64 bit references what windows OS you are running. If you are running 32bit, then that's what you download.