The glass is pretty easy to make. Create a plane (shown in green) and align it to the rubber of the windshield as shown in the picture.
Now just do some extruding to fill out the rest of the glass. You can also cut in some edges if necessary. Put a symmetry modifier on it.
If you want the glass to look realistic when rendered, you will have to give it some thickness like real glass. The easy way to do this is to put a "Shell" modifier on the geometry and this automatically thickens it. Play with the settings till you get something you like. The settings shown are the ones I used. Put a MeshSmooth on it.
3DTotal
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How about we put some license plates on the front and the rear? Create a box and position it on the front as shown. Duplicate it and put it at the back and adjust it accordingly.