My entire system has shut down, and someone said it's the security system. Where's the switch or reset button?

When you disconnect the battery, you need to reset the security system and immobilizer.

https://www.google.com/search?q=1999+ford+escort+reset+security+system

The Fuel Shut off has a red reset button on it.

https://www.google.com/search?q=1999+ford+escort+reset+emergency+fuel+shut+off+system

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this year model did not come from the factory with a security system but many were installed at the dealer, is there a button under the steering column? if so i recommend you delete the alarm, if you ever have issues with the battery this will happen again. follow the wiring from the red light to the alarm control module and unplug the main clear connetor from the unit, also at the ignition switch you would have to unplug the ignition switch connector from the wire lead that goes to the alarm and reconnect the trucks factory connector to the igniton switch to take the ignition out of the alarm circuit

No reset button .You have to replace the ignition switch and lock cylinder the security system does't reconize your key and is shutting down the fuel injectors.

antitheft system fitted use remote controll to reset antitheft system

there is no reset switch ford uses a inertia switch on there fuel pump but not gm when you try to start is the security light on the dash flashing if so your security system has shut down fuel pump and there was probably nothing wrong with old one

1st of all Read Your owners Manual, Depending on the Radio you have in it will depend on the Alarm system . Also Completely Disconnecting the Battery Will Reset your Security System

You need to reset the alarm system.That can be done with the remote entry key fob or by locking then unlocking the drivers door with the ignition key with all doors closed.This is for a factory alarm system.Also check the inertia switch,should be in the trunk,on the side with a push button top.Push button.If already down its not tripped.

renew battery in remote.then lock and unlock to reset system.(hold buttons down for 20 secs)

1. 
   
2. you know were it is right?
   
3. Turn the ignition switch OFF .
   
4. Ensure that there is no fuel leaking in the engine compartment, along any of the lines or at the tank. There should be no odor of fuel as well.
5. If no leakage and/or odor is apparent, reset the switch by pushing the reset button on the top of the switch.
6. Cycle the ignition switch from the ON to OFF positions several times, allowing five seconds at each position, to build fuel pressure within the system.
7. Again, check the fuel system for leaks. There should be no odor of fuel as well.
8. If there is no leakage and/or odor of fuel, it is safe to operate the vehicle. However, it is recommended that the entire system be checked by a professional, especially if the vehicle was in an accident severe enough to trip the inertia switch

Chris,

I know you have the solution by now by Im submitting this post anyway.

To reset the oil maintence:

Have the car in a secure location with the engine off

1. Press the ingition button once, do not have your foot on the break pedal
2. Make sure you have the instrument cluster (panel on left hand side below gauges) open
3. The button marked "reset" depress it for 30 seconds and the "oil maintenance," should be reset.

Hope that helps.