all versions of iTunes will be compatible, the iPod touch just cant be updated beyond 4.2.1
It is compatible with the IPod Touch 2nd Generation. It is not compatible with the IPod Touch 1st Generation.
Preferably the newest version. You can find this on the Apple site or type in 'iTunes' to google.
It depends whether that touch screen phone is compatible with itunes, such as the Iphone.
The iPod touch is not compatible with Windows Media Player. You must have iTunes for the iTouch to work. You can download the latest version of iTunes for free off of the internet.
The third generation iPod Touch can be compatible with any new Apple updates as long as it has been unlocked. If the iPod Touch has not been unlocked or "jailbreaked" then you can only use the most recent update provided to you by Apple Corp.
Nope
Yes. It doesn't matter what software your iPod touch has - it will still be compatible with iTunes versions 8 and up.
The latest version of iTunes is invariably the right version for most users. (See links below)
The iPod Touch requires iTunes 9 (See links below) and will not work with earlier versions of iTunes.
download latest version of itunes and you should be fine
Reset your iPod / download a new version of iTunes