You need to parent the splineIK curve to your main control in order for the spine joints to move with the rest of the body. In your scene, curve2 should be parented to nurbsCircle1.

Also, you should adjust the local rotation axes on the joints. Many of them are out of alignment and could cause you some problems when you start animating. Simple solution is to unparent the leg and spine joint chains, select the parent joints of the respective hierarchies, and freeze transformations (Modify menu). I would also freeze the scale transforms on the main control (Modify > Freeze Transformation option box). Then, reparent the joints to the main control and delete the extra transform nodes in outliner.