I just bought this car. When I turn off the engine and remove the key, the doors automatically lock after 60-90 seconds and the car alarm sets. I don't want the doors to automatically lock when I leave the car. How can turn off this feature?

The feature is integrated into your security system and will be difficult to bypass...
however you could disable the door of your choice by pulling the door panel and
disconnecting the automatic lock connection... the other 3 will work and you won't
lock yourself out anymore..

Go to the dealer and have them access the body control module with their Consult II scan tool and turn it off.