The render window is not expected to be interactive when using ParaView’s Python scripting. One important exception is if you are executing Python scripts in paraview.exe - in that case the RenderView is interactive.
ParaView and all supporting libraries are 64-bit. It will work only with the 64-bit Python installation. There is no need for 32-bit anything. But as I mentioned here, pvpython.exe may be your best bet.