3 newbie questions!

[jakang]

1. in combi mode, if i have a sound that contains of lets say 4 timbres. Can I assign one of those timbres to a volume pedal, so i can bring in and out string or pads or whatever I choose in that particular timbre?

2. Since i´m new to all things midi, i would like to know if it´s easy to set up a midi keyboard in addition tomy m50, and if it´s possible to, at the same time, play a sound on my m50 and another m50 sound through my slave midi keyboard.

3. Can I please get some advise on wich expression pedal to use with the m50. I would like to use it for wha-leads and volume.