Hi gmirsky......welcome to TFF.
If your Mannlicher Schoenauer is
a Model 1910, it's probably in caliber 9.5x56mm M-S (AKA 9.5x57mm M-S).....that was the standard caliber for the Model 1910. Bullet diameter is .375.
Parts are going to be really hard to find for this one. The only place that I can think of that might
have some is Jack First: http://www.jackfirstgun.com/catalog-mtoo.html
Also, you might want to contact this fellow and see if he has any ideas for you: http://www.mannlicherschoenauer.com/
Or.....if all you're missing is a few small parts, perhaps a (good) gunsmith could make them for you.
Mannlicher (type) stocks (& parts) are available here:
Is it worth restoring? Well, if the basic action & bore are sound, and if you really like the rifle and are up to all the hassle of finding the parts.....it ain't gonna be cheap or easy......
But hell.....I've got a real soft in my head (and heart!) for the old Mannlichers, so I'd say GO FOR IT!!!!
And best of luck!