Hello,
TimeFactor's Multitap effect does not have a specific knob dedicated to the number of repeats, however by using the combination of Dly Mix, Feedback,Taper, and Spread, you can control not only the number of repeats but also the rhythmic patterns of the repeats!
To answer your second question, TimeFactor's Footswitches can transmit program change and TimeFactor's konbs can transmit MIDI Continuous Controller Messages. To transmit both at the same time would require both pressing a footswitch and turning a knob.
Alan