Hi Zorsan!!!
3. Left System provides Nose Wheel Steering. Through the rudder pedals you can get to turn the Nose Wheels "up to seven degrees in either direction".
8. In Normal Operation the Demand Pumps work when one activates systems that do require an higher output (higher demand) from the Hydraulic System such as Flaps and Gear (at least that the understanding that I have).
10. Without C and R Hyd systems there won't be Stabilizer Trim (Pitch Trim). Without Stabilizer/Pitch trim NONE of the Autopilots will work/function.
Hope this helps.
Take care,
Zero
PS. On a side note, how did things went at AirBaltic???