[New to hot tubs need HELP!]

Bought a older model tub off family member cheap, there is no pump no heater, not even a model # or serial # on it, bought it dirt cheap, is there anyway to figure out what pump/heater I would need to make it work? Thanks In advance 

[Need help!!!]

That’s just it I don’t have anything but the tub and pluming, the controller just says heldor on it, it’s 78” square tub with 6 jets 

[Need help!!!]

Anybody have any idea what kind this is? No info at all is available on it, bought dirt cheap from family member, but needs a few things? Any help is appreciated, just says heldor on the control panel