How would intelligent lifeforms evolve bio magnetic resonance imaging? No bionic components or any other prosthetic technology is allowed, how can I extend the ability to see through dehydrated objects such as TV and piggybank? Magic is banned.
They would not
If you exclude magic from this question then the answer is simple: they would not evolve this ability.
MRI works by creating extremely powerful oscillating magnetic fields, in the Megahertz-range (i.e. radio frequency range). There is no known biological function that can create Megahertz frequencies, let alone narrow-band such frequencies, let alone in field strengths of 0.1 Tesla or more. That a creature could gather the immense amount of energy needed for this, and then being able to convert this energy to electricity and pump this through electrical conductors in such a way that you get a usable MRI field from this is far beyond what biological life can muster.
Then there is the problem of detecting the response of the resonating atoms. For this you need to surround the thing you are looking at with receptors. And these receptors must then be able to do advanced two-dimensional Fourier Transforms. Now granted the latter is not a very big deal since one-dimensional Fourier Transforms is what our ears do. But here you want an entire string of "ears" that wrap around that which you want to "listen" to.
So in order to evolve this, you must include magic, i.e. physics and biology of which we have no clue how it works. Otherwise you are bust; it will not happen.