Vehicle security system.

Hello friends,
my project is related to vehicle security system in which i am going to use finger print module and gsm module.Wanted to know how to interface fingerprint module and gsm module with arduino.Basically the fingerprint module will scan the fingerprint of the user with the preloaded database of fingerprints, if the fingerprint matches with any of the preinstalled fingerprints then ignition system will turn on(actually want to turn a servo motor on to indicate it),if not then an error would be generated on the lcd and user would be asked to try once more.this process will run two more times if the user is not able to produce the preinstalled fingerprint(Total=3times).If the user goes wrong the third time an error will be generated and a message will be send to the respective owner of the vehicle through the gsm module indicating that someone is illegally tying to access your vehicle .
Plz help me out with the coding and the necessary details ...
Thank you.

Plz help me out with the coding

What have you got so far?

Wanted to know how to interface fingerprint module and gsm module with arduino.

Which ones?

if not then an error would be generated on the lcd

What LCD?

Plz help me out with the coding and the necessary details ...

What part of the project are you doing?