Can you use magnets in making motors? Certainly -- in all sorts of ways.  We use them all the time, whether permanent magnets or temporary or elecromagnets, or instead we even use electric charges to push/pull.  Nooo problemo!!!   We also use springs.  They also pull/push where we need energy.   Springs... let's think about springs.  I want to convince you to buy my motor that works on the push/pull of springs.  Maybe it is a simple thing like a longbow, or a complex thing like a mousetrap, or a barely conceivable thing like a clockwork motor. And I explain to you that it is powered by the electric forces that hold the atoms of the springs in place.  Right? Right. Quite correct. Right inside the spring there are atoms that are held together by electrons and protons attracting each other and repelling each other mainly by their electric charges in their orbitals and a few assorted quantum numbers, such as spin. OK? OK. So I show you how clever my motor is and I promise that you don't need to wind this motor because the magic of quantum spring power. Hooke's law and all that.  Great man, that Captain Hooke. He nearly got Peter Pan! But the forces of Multinational  Capitalism wanted to suppress his invention of Free Power For Crocodiles to increase their profits, and only now, in secret labs, have I been able to re-discover his magic! With me so far?  Now how many do you want to buy? Remember, it is Hooke's Spring Magic; free power for ever! Why not start with a six-pack? You disappoint me!  Not even one?  Haven't I explained that it is free power forever? What? You have noticed that to get power out of a spring, you first have to put power in? Draw the bow, or wind the spring or the like? And that you get out no more than you put in, and actually in practice somewhat less? You know, it is negative thinking like that that led to the failure of the of N-ray industry.  Don't think of vacuum energy as "nothing in", but rather "in nothing"! Be an optimist today; cheer up a pessimist to make him suffer! I suppose that next you will be arguing that just as one cannot get pull/push energy out of a spring without first putting in push/pull energy, so you cannot get it out of a magnet? Or electrostatics. Or out of gravity?  Look, there is no need to be small-minded about it.  No need to let scepticism degrade into denial.  If anyone promises you free energy by any such principle, believe them, subject to just one criterion: if you can be instructed how to construct such a device from scratch without magic parts, and the device can drive itself at a profit in energy, say powering your car as well as itself for more than the equivalent of a tank of petrol or bank of batteries, then by all means, accept that he has something and credit him with all he has earned by demonstrating the world turned upside down and reward him accordingly.It is the decent and sensible thing to do. But till then, the more he explains and the more he guarantees that for the merest start-up money he can do you a 419, and the louder he talks about his honour being worth its weight in gold, the more carefully you be sure to check your good sense and  count  your kilojoules. And your money.   Cheers,   Jon      

Free energy is a form of perpetual motion. This has been sought throughout history but is forbidden by the first law of thermodynamics.

You don't get something for nothing in physics.

                                 Antique free energy permanent magnet motor--->

http://en.wikipedia.org/wiki/History_of_perpetual_motion_machines

no, Energy can be neither created nor destroyed. It can only change forms.

you would only take the energy that is allready in the device (the magnets) and changeing into useable energy to power (said) device/s) untill the magnets depolarize.