iLife is a MAC program....not a iPad program. You can get Pages ( Word Processor ), Numbers ( Spreadsheet Program ) and Keynote ( Presentation Program ) from iTunes though if you are looking for those types of programs.
One or two rumours in the blogosphere that apple may be working on a version of iLife for the iPad, but when it will appear is an open guess. The limited ram on the gadget would be a major hurdle.