Hi,
To answer your contour labeling and legend questions. You can display the numerical elevations of the contours using contour labels. (Surfaces > Labels > Add Contour Labels). There are several options for placement. If you want labels at set increments along the contour, use the 'Label Multiple Group Interior' option and specify the increment.
To create a contour legend, generate a contour analysis (select the surface, right-click, click Surface Properties, and click the Analysis tab). Once you have your analysis, click Surfaces > Add Legend Table and select Contours as the legend type.
Regards,
Jonathan Burgoyne
Autodesk