Reply to help bringing my vision to reality!

OK so I'm a musician but admittedly know very little about music technology. What I want to do is hopefully pretty simple I believe I'm in the right place for help...

First for the hardware, I wanna be able to sample sounds (guitar/beatbox/anything) live and play them on a loop, each sound to an individual channel so that I can fade/mute/drop each sound individually, quickly and with ease. Then the next step, which I'm assuming requires the laptop, would be to have a way to make greater adjustments to each track individually, like delay, pitch and other more complex effects, but also done live and relatively quickly.

I hope I can get some awesome suggestions of equiptment that would work for me... And yeah I should mention I'm on a budget so nothing too crazy... Thanks in advance for your help!!

Sean