oil light

Hey everyone, Newbie here to the forum. I'm having two issues with my 2012 Q5. The first one is the add a quart of oil light to the light on and it will not go off even after changing it and after trying to add another quart. Is there any way to reset or is it a sensor I need to replace? If so...

I recently had my oil low warning light pop up, the oil was 1/3 between the min and max. I topped up around 750ml and now the oil is 1/3 above max. Should I be concerned?.

Help please.was driving and oil light came on.pulled to hard shoulder and put oil in.tried starting engine and sounded terrible and white smoke poured out of exhaust and a bit from the engine.got recovery truck home.i havnt got a clue what happened but on starting engine back up it whistles like...