Hiya,
I used to run iTunes on it a few years ago (on Windows XP) and it ran OK. Not sure how the current version will run though.
I think the processor is a 2.4GHz Pentium P4.
Just in case it's not clear, this PC has no operating system installed on it at the moment. It does have a license for Windows XP Home Edition however, so for a donation to NTL I'd be prepared to find an ISO of the install and do a base XP installation.
Cheers,
Mark