To get the 4 views like Hammer, just go to Window->Viewports, and open up a few more viewports. Then just click in each new viewport and set it to the view you like. Look for where it says “Perspective” and select a Top, Side or Front view. Then just snap the windows to whatever place in the editor you like them.
As for resizing, I dont know if there’s a way to get handles like Hammer has. I wish it had them, too, but instead I think you can grab verts and move them.
As for duplicating, just copy and paste to make them appear in the same spot.
Better yet, hold Alt and drag to duplicate them but only move along the axis you drag them.