no power

Hi all, My car head unit all of a sudden turned off and now won't turn back on again tried fuses they seem OK including the one on back of head unit? I don't know what else to do it was working perfectly.. I've never had this issue before. I believe its fuse number 46 20amp that's the head...

Driving home from work today, accelerated the car from maybe 20mph to 30mph relatively hard, followed by a massive cloud of white smoke from the exhaust pipe at the back of the car, and loss of turbo power, now the car sounds very chuggy and ofc no turbo, There was no Bang, just a cloud of smoke...

so i know nothing about cars but from time my car will vibrate when started, with this the traction control, engine and tyre pressure lights all come on. also the ‘EPC’ light? if i turn the car on and off it will sometimes go but sometimes takes a few attempts. i can’t drive when the car...