TRC off... maybe u pressed a button or something something that switched your traction control off. If so, just press it again when ur done drifting like one guy said...
If VSC always on... dunno, maybe u screwed the Vehicle Stability Control and it needs checking...
I use to use tyres which came stock with the car(not sure what it is though). then changed them too Advan AD07. They were good. but alot of people also said Potenza Re-01R were the best(unfortunately the price tags...