I would suggest visiting http://lbt.linuxcare.com/ and downloading (or
otherwise obtaining) an LBT CD. With this you should be able to boot
the system from CD, then mount the XFS filesystems manually, running
xfs_repair if necessary. Actually it would probably be best to run
xfs_check first on each of the filesystems, followed by xfs_repair if
errors are reported.
>From the log messages you posted, however, it appears that init (and
possibly other critical system files) may have been lost, or perhaps
deleted if crackers have been at work.