Pls help!!!

I have a 2006 cobalt 2.2 lt
eng.. automatic. .I've had it
for over a yr and It has been
hormonal since day one.. at
first it started out stalling
and idle was off.. now its
progressed into taking
fifteen mins to start it after
dying, bogging out and
chugging harshly.. with it
going haywire with alerts
like service airbag, engine
power reduced, theft, oil life
reset tc light and not to
mention my alarm goes off
everytime I get into it... once
in a great while it starts with
no prob but its very rare!!!!!!