ok so lits start with the basics you need 24 tranqs from a crossbow to ko it.

you need a 2x2x1 wooden trap with doors and ramps.

you can easily lead it by walking infront of it and just staying out of melee range and not to far that it turret modes you once in the trap theres not much more i can say.

Enjoy your tame :)

More Velonasaur Taming & KO Tips