Unfortunately these are all fairly weak. The main one (OP) does not have any power source or motors.
Being purely mechanical would mean it takes more effort to move in it than outside it. (assuming conventional physics still apply in this universe.)
As a mechanical/robotics engineer, i honestly believe it is possible to build a functioning, fast and maneuverable small scale mech. (No gliding, flying or energy shields. sliding or "skating" might be possible with some ingenuity. )
It would be possible to have it flat land sprint at around 80kph. With a skilled pilot, Parkour wouldn't be out of the question.
Given the resources i honestly think i could do an omni-frame style unit justice, in real life.
It would probably cost around 50 thousand for me to get all the parts together. i would need one co-worker who knows his way around CAD and a year-ish of free time. (I'm self employed, so i could probably pull that.)
I'm assuming in the cost that i'm working for free, There's nothing on this planet i would love more than to be able to put my schooling into something that cool.