Your question seems like it is incomplete so it's difficult to provide a complete answer.
For the moment computation, what you'll need to do is compute the centroid of rotational stiffness, which is determined by the relative stiffness of each shear wall in the X and Y directions. Then you'll compute the moment arm based on the distance between the stiffness and loading centroids, which will give you the applied torque (or moment). The torque is then distributed to each shear wall in relation to its relative stiffness and its distance from the stiffness centroid. For pure shear (ie, ignoring rotation), you'll do a similar procedure but using forces instead of moments/torque and ignore the contribution of the walls perpendicular to the force.
In order to do any of this, the first thing you have to do is compute the relative stiffness of each shear wall.
If you don't know how to do this, for a quick primer I recommend Seismic Design of Building Structures by Lindeburg.