When starting alarm sounds and a dash light flashes tow

I need more information. Do you mean that when you turn the key the horn blows and the lights flash on their own? Does your car have an after market alarm system? If it does you may have a problem with the alarm system. Does the car even make a sound like it is cranking? If not I would join an auto club that has free towing and bring the car to some one that installs aftermarket alarms and stereos and see if they can fix it.

This may be stupid but have you locked and unlocked the
drivers door (with the key,not the remote)?

It is a factory alarm put the key in the driver door unlock the door and try it again should take care of your issue.

subarus` are bent on safety ,there has to be a reset,,,,?

This may sound silly but it worked for me. Try sticking the key in the drivers side door with the alarm going off and go through the motion of unlocking the door. Good luck.

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Have it towed to a car alarm specialist that is familar with Chrysler products. With a little luck they can fix it.. To reset alarm
(if it will work}, try locking drivers door and unlock it with the remote from outside.

The 5 second thing does not sound good.. Usually this locks your ECM out so it will never start. Thinks someone is trying to steal it.

since the alarm is sounding I am assuming this is an aftermarket alarm system

if it where the factory system the vehicle would not start but the alarm shouldn't sound

do you have a little red light on the dash flashing somewhere....if so then there is a kill switch somewhere on the vehicle... look under the dash

sounds like an alarm system that has the horn disconnected,so when you start the vehicle it trips the alarm then resets itself after awhile .see if there is an aftermarket Alarm system under the dash and remove it!

I would start by removing the pesky alarm. My encounter with alarms is they create more problems than they actually help a badly wired alarms systeme can be a true nightmare. My advice the best lock for your vehicle is the lock that locks the gas and brake pedal together best invention yet good luck

try taking the negative off the battery for 20 secs then put it back on and try it