Change of oil and found metallic spring etc inside - need your advise.

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Andronikos, I have torn down engines with one audible bearing bad and lucked out with the crank still good. I have seen it go the other way plenty of times to. Sometimes you luck out. I didn't read the cause of that oil pump failure or was it just the rod. Is it a high volume pump. I can't see the lifter clip making it past the oil pump screen.

If by some chance you luck out with the crank then you have more options. You can always throw money at this thing but I think you need to know what you have first. Find out about the bearings and then let's brain storm and debate the situation considering where you live.