It sounds like you will need to update the OS on both for iCloud (if they can).
From iCloud: System requirements
PC
Microsoft Windows 7 or 8
iCloud Control Panel 2.1 or later
iTunes 11 or later (for iTunes in the Cloud and iTunes Match)
Outlook 2007 or 2010 or iCloud.com
Safari 5.1.7 or later or Internet Explorer 9 or later (for iCloud.com and Bookmarks), Firefox 16 or later or Chrome 23 or later (for iCloud.com)
Mac
OS X Mountain Lion v10.8.2 or later
iTunes 11 or later (for iTunes in the Cloud and iTunes Match)
iPhoto ’11 version 9.4 or later or Aperture 3.4 or later (for Photo Stream)
Safari 6 or later (for iCloud.com, Bookmarks, and iCloud Tabs), Firefox 16 or later or Chrome 23 or later (for iCloud.com)
iWork '09: Pages 4.3 or later, Number 2.3 or later, and Keynote 5.3 or later (for purchase from the Mac App Store)
ivan