All lights gone off today and working ok Do I still take to garage Tell them it's xyz sensor ???

Hi all I'm new to site and need some help I bought discovery 3 on Friday 14 th and the yellow park brake light has come on , and yes gear selector acting up and no reversing lights , Garage has said they will fix as in warrenty Is it simple can I still drive it Also I can't get...

Hi new to site , have few questions as bought discovery 3 on Friday 14th