1. Cut & Fill is the method provided within Revit. You could use good old fashioned pencil and paper to calculate the average cut/fill of a bunch of grid areas and add them all up.
2. Section Box is the only way in a 3D view. But you can then hide the Section Box if you don't want it in the view. For Elevation and Section views, just make sure the extents of them fall within the topo boundaries
3. For something level, you could make a simple family. For something that follows topo, you're going to have to spend a lot of time learning. I'll suggest the following head-exploding guide: http://au.autodesk.com/au-online/classes-on-demand/class-catalog/2013/revit-for-architects/ab3340#ch...
