Volvo Forums - Volvo Enthusiasts Forum - The Car chokes every time and starts on the second try...Why?

I have a 2001 Volvo S80 T6
Check Engine light is on.
I have scanned the car with an OBD2 scanner and here are the codes:
P0300
P0301
P0030
P1238
P0335
P1181
P1618

the car never starts on the first try and if it does, it chokes untill it turns off. Then, I try again and now it starts full power...
when driving, if I press the gas suddently and then, I press the brakes, the car starts to choke again. The RPM needle goes up and down between the 0 and 1.

Either I have to put it in Neutral and then press the gas or if not, the car stops. It happens when their is a lot of traffic. This is where I have to put some gas in and brake suddenly.

What can that be???