MIDI sequencing for live perfomances

[chipF <chippo100@mediaone.net>]

hello:
I am brand new to MIDI. So be kind.

What I am looking to do:
In a live environment, control my Jomox AirBase with a computer (PC or Mac)
using MIDI sequencing.

I am wondering what hardware and software will be best for what I want to
do.

most important:
to be able to control what song, or pattern the Jomox is playing via a foot
controller. 
not as important:
be able to solo MIDI tracks via said foot controller.

so I need suggestions on:
1) what platform to use (Mac or PC)
2) what harware to use
3) what software to use
4) what footcontroller to use

thanks :
chippo100@mediaone.net