BMW X-5 Codes P0455,P0505

I am trying to get my SUV inspected and these are the codes it is getting kicked out for,
Any help to diagnose these codes and let me know what I need to replace to fix them would be so helpfull!

P 0455 Evaporative Emission Control system leak detected (gross leak)

P0505 Idle Control System Malfunction
P0455 is your Evaporative emission system leak ( large leak)
P0505 is the Idle air control system

These problems are best to be tackled with your local BMW dealer.
As special diagnostic equipment is needed .
and a smoke machine for the P0455 problem.