I will be moving into a home that was a foreclosure and there are no remote openers that came with the house, but a WIRED keypad is mounted on the outside. Can anyone give me the instuctions to reset the keypad code so the previous owner cannot open the garage door?

There is a direct relationship between the wiring "plug board" and the keypad code.
Remove the back of the unit which is located in the garage and try to decode the present setting. Then program your own code, accordingly.
You might also stop by your local Sears store and see if they could copy an instruction sheet for you.

I would disconnect for now for safety. Can you provide picture, as there are several types.
Try these 3:
http://www3.sears.com/intro.shtml
LiftMaster instruction manuals, LiftMaster garage door openers and operators instruction manuals
Garage Door Openers

Push the "Learn" button (generally square, red button) on the motor hanging from the ceiling of the garage roof. Once you push this button, you have about six seconds to scramble to the keypad and enter your four digit code, ending by pushing "enter." Done deal!

Push the "Learn" button (generally square, red button) on the motor hanging from the ceiling of the garage. Once you push this button, you have about six seconds to scramble to the keypad and enter your four digit code, ending by pushing "enter." Done deal!

If all else fails, call the store where you bought it; the salesperson is trained to help you.

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Salena, what are you selling?

It's actually about thirty seconds. Don't injure yourself.