How to move 500+ animated humans based on precalculated coordinates?

Hi

I have about 30 FBX human models with about 5 skins and 3 animations each. Based on this, I want to visualize precalulated walking data (from a 2D pedestrian simulation software) in 3D. In the simulation database, each agent has X/Y-coordinate, walking direction and speed for each time step.

Does anybody can give me some hints how I can create, place, and move these 3D agents along it's predetermined path in the 3D world?

Neither physics nor collision detection is needed, but agents should be animated depending on walking speed (idle, walk, run) and should follow the terrain (inclusive stairs in the 3D model).

Thank you for any help.