2000 Ford Excursion

We bought a 2000 Ford Excursion, 184,000 miles, on Thursday and now it will not start. We suspect it has something to do with the security system because of the noises it makes when we turn the key. How do you reset the security system? How do you override the security system? In the alternative, who do I call in the Texas Panhandle to fix it? I am EXTREMELY frustruated.
Allison Johnston
June 9, 2007.

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