Are you dual booting Windows and Linux? From what I see, Linux does not see a valid boot loader, and BOOTMGR sounds awfully Windows Vista/7 like. And I know for a fact that Linux uses no such file. It also looks like your partition table may be damaged. I wouldn't be surprised if having two bootloaders on your hard drive is part of the issue (You have one on the MBR, and on Partition 2).
At this point, I'd say your best bet would be to copy all of your files on your home partition (or home folder) onto an external hard drive or flash disk and reinstall Linux. If you use Windows, be sure to get it in a working state using startup repair, or the recovery console before installing Linux, otherwise you won't be able to boot into Ubuntu. I'm not going to lie when I say you may need to reformat the disk as well.
I'm sorry that this is the case, and I hope that you're able to recover all of your documents.
Camden Stensland, Fedora Quality Assurance Officer