The alias surface version is more for automotive and create "good" or class A surface for the development and engineering - but depend which field you are working you can choose a products more suitable for you. In 99.999% of the case al surface must be rebuild in Catia or similar by people with experience if you need a class A- as said it you are working on the concept stage it is not your concern beside the missed skills. Thios doesnt mean that they are not useful, but this little jump from one prog to another when could be all integrate in one is silly. The autostudio is an integration of different programs from sketching to visualization a "bundle".
you just export mesh geometry. you can tesselate your geometry in alias (Auto Studio only) by the plugin "optimize for draw", that tessellates your mesh as fine as your construction options are. If you use the light Alias version you can tesselate also by the tool in the palette but it will leave you gaps. Take the meshes and export it as FBX. Done! If you are using an earlier version of Alias you do not have FBX export. You will have to export every part separately by OBJ. You could think of exporting everything by Material.
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