This morning it started fine but will not come out of gear and my airbag light is on. Someone said it was the fuse but I am not sure which fuse. Any ideas ?

Won't come out of what gear ? Is it stuck in park ? Did the air bag light just come on with this gear issue or has it been on ? I don't think it's a fuse . You may have a problem with the shift lock control system if you can't move the gear selector out of park into a gear , the brake light switch could be bad , do your brake lights light ? I'm assuming your vehicle has a automatic transmission ?
Automatic Transmission Shift Lock Control System
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
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The automatic transmission shift lock control solenoid

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The park lock solenoid

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The stop lamp switch

With the ignition in the ON position, voltage is supplied to the stop lamp switch. Voltage flows through the normally closed contacts of the switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid causing the transmission shift lever to be physically locked in the PARK position. When the brake pedal is pressed the contacts in the stop lamp switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be move out of the PARK position.
Park Lock Solenoid
The park lock solenoid is a safety device that prevents an inadvertent shift out of PARK when the key is in the OFF position. The key must be in the RUN position to release the park lock solenoid.
The system consists of the park lock solenoid.
With the ignition in the ON position, voltage is supplied to the park lock solenoid. The park lock solenoid energizes through a permanent ground unlocking the shift lever. With the ignition in the OFF or ACCY position the park lock solenoid de-energizes and locks the shift lever in the park position.
The first thing is have it checked for DTC'S - diagnostic trouble codes .
Symptoms - Automatic Transmission Shift Lock Control
Important: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true:
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There are no DTCs set.



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The control modules can communicate via the serial data link.


2. Review the system operation in order to familiarize yourself with the system functions. Refer to Automatic Transmission Shift Lock Control Description and Operation .

I am mechanic I really need to no more make ect. but it could be battery or the ignition switch or ignition lock n key but like I said need more information this is a guess that I told you