about the leaking, it could be from a different things
do u see the leaking in a FOAM like ice cream or like WATER?
if it was like a FOAM, then u need to check the head gasket coz it leaks water into the combustion chamber
if it was normal water then check pipes or the radiator
about the air bag light, i guess u hit something but the air bad didnt inflate, i think u should do a reset to the whole Shock sensor, take ur car to som1 who knows how to reset it
hope i answered ur Q