2007 Macbook Pro 17" problem

I have a late 2007 Macbook Pro 17", not sure how but my permissions are all screwed up and I am unable to fix them, so basically I can't use the app store to upgrade or get software updates I need.  Permission repair doesn't seem to fix them? Is there anything else I can do to fix my permissions problem?

Have you tried....
Mountain Lion Recovery
Boot up from your computer by holding down the command+r keys.  This will take you to the recovery drive.
Select Disk Utility & hit Return. 
In Disk Utility select the HD on the left & click on Repair Disk (bottom right).

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  • Late 2007 MacBook Pro intermittent black screen

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  • 2007 MacBook Pro Screen becomes distorted and Computer becomes unresponsive

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