A screenshot might help to diagnose the problem. If you don't see the objects in any views, maybe the layers are hidden? On the right side of the layer title there's an eye icon. If this is closed, the objects in the layer are not visible in the viewports. If you don't see them in the render, this could mean that either they are not in the camera's field or they are hidden from render (if you click on the left side of the object title you toggle render visibility, signaled by a cross that appears or not there).
Hope that helps.