I need to change user name and password on my macbook pro

I need to change user name and password on my Macbook Pro OS version 10.6.8. As I purchased it used and can't remember what user name and password the original owner gave me. I need to install printer drivers and can't until I can sign in.

Reset the computer to the factory condition.
Giving away / Selling your Mac / Resetting  the computer to the factory condition
http://support.apple.com/kb/HT5189
http://www.thesafemac.com/how-to-prepare-your-mac-for-sale/

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    Message was edited by: J Perry

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    * If this post has helped you, the White Kudos star on the left is a great way to say thanks!
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