Hi!
There are 2 ways to do this. Either use KymaConnect which builds up a virtual MIDI port or do it the good old way by connecting a MIDI cable from the interface you are using in your DAW to the interface you are using with the Paca(rana). Make sure you specified the interface as MIDI input in Kyma (DSP->Status->Midi Input). You should see a small 'm' in the top left of the DSP status window when Kyma is receiving MIDI.
There are numerous MIDI message already mapped inside the global map, most convenient: !KeyDown, !KeyPitch, !KeyVelocity, !PitchBend, !ProgramNumber. Also there is !bt00, !sw00, !cc00 which results in a button, a toggle or a fader following MIDI cc00. To see all go to Open -> Kyma 7 Folder/Global Maps/default.map (You can also edit or create your own global map).
If you want Polyphony check the MIDIVoice prototype, it replicates the signal flow according to the polyphony settings.
You could also try searching for Sound Names containing 'KBD' and you'll get 100s of Sounds using MIDI control.
Hope it helps :)
Best,
Gustav