A: No. Trimble has never released Terramodel as freeware. Any “free download” is pirated.
Comparison between older versions (10.4) and contemporary platforms like Civil 3D. Trimble Terramodel 10.4-mediafire.rar Autoatlas Bewerbungs
A: Possibly, if you also show willingness to learn modern Trimble tools. Autoatlas likely uses current software for legal compliance. Trimble Terramodel 10.4-mediafire.rar Autoatlas Bewerbungs