I will also add a few questions; Would it be possible for you to specifically described all of the visible damage?
You might also pay some attention to, and perhaps describe the tuning machines ("machine heads"). on many older Mandolins, as well as other older instruments, the specifics of machine head design and spacing are quite different than modern practice. It might be very difficult to repair this critical aspect of the instrument to playable condition. Without reasonably functional machine heads, the instrument will be more pain it is worth.
you might consider taking the instrument to a respected repair shop for an opinion and estimate.