Hi Kong,
At least since the windings show a decent resistance reading, you'll know they aren't "open" (broken wire) and since they do not measure 0 ohms resistance, they should likely not be shorted out either, but there is no guarantee.
Can the seller tell you what application they came from? Maybe this will give you an idea of their power capacity.
I'm more familiar with permanent magnet servo motors, where no field winding is used. You might need a fancier drive amp to run that type, because of the live field windings. Maybe Google a bit and see what kind of info you can come up with on that general category of motor, or survey the online drive amps catalogues and see if they advertise what kind of motors they will run.
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)