I rebooted my mac book pro and then i lost all the contents of PRAM! How do i get it back!

How can i get everything back!

Hello,
The problem I have is that the information that was stored under the apple menu (located on upright of the screen) then under "About this Mac" then "More Info...", all that info is not available anymore. When I did a reset on the PRAM that info seem to be gone! The reason I had to reset the PRAM was because when I was deleting some files from All Documents folder I was trying to delete more than 1000 files at a time. I read on apple on-line help to perform this step but now I do not get the information I need. Most importantly the Serial ATA drive, how much harddrive space have I used and left!
Thank You!

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I rebooted my mac book pro and then i lost all the contents of PRAM! How do i get it back!

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