The warning light and inability to start are telling you that the car's computer has detected a fault that prevents the car from operating safely. Simply resetting a code (which might be possible with an OBD-II scanner) won't solve the underlying mechanical or electrical issue.
Attempting a reset without addressing the root cause could even be dangerous.
What you should do instead:
* Don't attempt to drive the car. Driving with a transmission malfunction could cause further damage.
* Have the car professionally diagnosed. Take it to a qualified mechanic or Ford dealership. They'll use diagnostic tools to identify the specific problem. The fault codes stored in the car's computer will be crucial for diagnosis.
* Be prepared for potential repairs. The problem could range from a relatively minor sensor issue to a major transmission component failure, requiring significant repairs.
In short, while you can find instructions online to clear codes with an OBD-II scanner, this is only a diagnostic tool and won't fix the underlying mechanical issue causing the transmission malfunction and no-start. Professional help is necessary.