fuzzy / pixelated edges footage & livetype in fcp 6

I have some old videos made with FCP 6 that have just been picked up by (hopefully) a company with a huge following. They were made by my partner who learned by the seat of her pants in editing 5 years ago, and the result is pretty good except for the fact that the videos look a bit fuzzy and the livetype stuff is pixelated. This was not a concern of ours since the videos were for nerd festivals and well, we didn't know how to fix, so didn't bother.

I would like to recapture or re-edit these videos so they're the sharpest they can possibly be for this new launch, but I am having some trouble.

1) The actual livetype movies themselves are perfect. However, on the timeline in FCP they look crappy.

2) Some of the footage looks fuzzy on the timeline, as though it's been through the wringer a dozen times. In editing terms, I guess it has been. The original footage does not look fuzzy.

3) When I searched online for hints about how to recapture the footage that I've got that isn't fuzzy - it's all on dv tapes (used a now ancient Panasonic dvx100B) - I read that I should take the footage and archive it offline using Media Manager - and then get it back online by recapturing using the camera and the tape. When I select the project that I want to recapture and hit Media Manager, nothing happens. I duplicated the project, using a different name altogether, and still could not get Media Manager to archive the thing.

4) What are my options at this point?

Any help greatly, greatly appreciated.

Thanks in advance.