If you are looking for replacement sets; you can either go to Apex Leisure in the UK or Apex Moto in the US or else TYGA. They are just some of the places to get trick parts for your NSR.
The standard set of metric tools (allen keys & wrenches) will remove the foot assemblies . You may also want to get some threadlocker/loctite for when you want to screw the bolts back on.
I had to pull apart my right foot assembly to replace the broken brake arm recently. I know absolutely nothing about cars or motorbikes, but I managed to do this little job
w00t!
The exhaust is probably the same deal. No extra ordinary tools are required I believe. I assisted a mate of mine when he was removing my exhaust chambers to get to my power valves for a cleaning. It seemed like it was all held together by a standard bolts??
... Oh, and you'll have to remove the lower fairings too 
Just have a go!
_________________
Jerry Lai
NSR250 [MC21SP]