2: Is for the brake servo
3: can be blocked off as it is the original breather hose from cam cover
6: I think is the coolant lines for the throttle body
I think 5 or 1 is for the MAP sensor also
Am sure someone else can confirm them
1) to the steering rack
2) brake servo
3) cant see where it is coming from, but thinking it may be used for the dump valve
4) engine coolant
5) to steering rack
6) to the aircon solenoids, block this up if they are disconnected.