move layout to coordinates of 0,0

Without messing with the origin in the whatever is generating the DXF file, any DXF import settings and with making some general assumptions about your problem you could try the following:

1. Add two line segments to the bottom left of the shape, snapping the start of the segments to the "Segment Vertex" of the shape.

2. Use Manufacture->Drafting->Trim Segments to remove additional line segments after the intersection point. This will now give you, what I'm assuming is where you want the origin of the dxf data to be.

3. From here you can either set the design origin to this intersection point by snapping to the segment vertex of the newly added lines, or you can move all your DXF objects to the design origin using the intersection of the newly added lines as your snap point.

Unfortunately the option to upload an image isn't working at the time, which would be more helpful. I'll check back later and add an image if they fix it.

Usually, I place a circular shape at the point I want to be the design origin. Then look at coordinates or the center of this shape using the Show Element command. Then I go to Setup-->Design Parameters -->Design Tab and put these numbers in Move Origin fields. Then delete the shape. 

A simple way to do this is select the shape(DXF) - edit move - in the command window type X 0 Y 0. The DXF fits into the 0,0 position.