I would really need a bit more information before anything could be said about the scroll... do you have a link to it?
That said, the only "true" copies of the Densho for Togakure Ryu (or the other Ninjutsu-related arts, for that matter) would be those held by the current headmaster/s of the system/s or branches (Hatsumi Sensei, Tanemura Sensei, or a few others). Other versions would most likely be simply either copies (probably personal interpretations), or just outright fakes.
I couldn't agree more! There really is no substitute for a good, quality instructor who can guide you personally through the subtle details of the art... remember, it's often what isn't written in the scrolls that is the most important. But if you can't find a teacher, look to things like Hatsumi Sensei's Togakure DVD, and his latest book Unarmed Fighting Techniques of the Samurai, as it has all the techniques of Togakure Ryu as well as the other main lineages of the Bujinkan written out for you... but you will still probably need a teacher who understands the kata to get the most out of the skills. The DVD and book are best treated as supplements. Enjoy!