I lost my alarm now car wont start.

I lost my car Alarm and my car wont start how can I get it to
start without the Alarm?
My girlfriend took my 2009 Mitsubishi Lancer to Walmart to
buy some stuff when you got back to the car to unlock it she
noticed the actual keyless entry was gone and the plastic
holder was in half which means it some how slipped out.
She opened the car and the alarm went off and after a while
it turned off. She then tried to turn on the car just to find out
the car wont crank at all. I tried disconnecting the battery for
30 seconds and connecting it back and it still does not turn
on. Is there any way around this or do I have to tow the car
home and reprogram the alarm? TIA. Ps. Car is a 2009
Mitsubishi Lancer.