Regarding the alarm, does it sound like the standard G1000 warning bell, or does it sound like an ELT siren. If it is the ELT siren, you can turn off the ELT switch located near the circuit breaker panel in the pilot's footwell.
Regarding starting the SR22, there are a few important guidelines for starting the engine successfully:
Don't flood the engine. 2-3 seconds of priming is plenty
When starting, keep the throttle at 1/4". If it doesn't start, slowly oscillate lower and higher until the engine properly starts
If the engine doesn't turn-over properly, the plane's battery could be dead -- it can be recharged from the SR22 menu -> Toggle Aircraft Window -> Recharge Batteries.