It's a 1874M80 French Gras rifle made by Tulle (not Culle). I assume it's in 11x59R, though some of these were converted to Mle 1874M80-14 in 8mm Lebel.
In terms of value, that depends on a lot of things, such as whether the rifle is matching, bore condition, etc.
As a minimum, it's worth at least $450 IMHO based on the pics you posted.