mechanics will use customer supplied parts, but they will tell you they have no liability on any failures related to parts because of that, at least if your talking to a mechanic who likes making money
i thought doing a clutch in these cars was pretty easy, but i have 6 years of mechanical expierence under my belt, so i guess im baised
simple hand tools is all you need honestly
you dont NEED to suport the motor, i let mine hang it was fine, but most people would recomend that you do support the motor
its pretty straight forward, if you can allow some down time to work on the car without rush, i would say go for it, take your time and be careful, the hardest thing is pulling off that subframe brace, at least it was pretty tricky for me, but that might have been because i was trying to do the job without removing that, and 2 other motor mounts