Good luck with your TC-15 build!!
1. What is the name of the non-electric heat sink past for the VMR MOSFET, I didn’t get any with the build and I’m sure I can get it locally.
You don't need any silicone grease, use the grey pad supplied to insulate the MOSFET from the chassis.
2. What is the gray thin pad under the MOSFET, is it the mica insulator?
see above
3. I put the Crunch-Munch switch on the front of my TC15 head above and between the cut and the treble switch, any problems with that location change?
No, I wouldn't think so. [but you'll spoil that beautiful faceplate

]
4. I would like to change the stand by toggle switch to a 1ma Electrical Linear pots 1/2w @500 volts and hook up the VMR to it so I can turn on and off the stand-by and uses the VMR with one switch-pot from the front of my amp, will that work? If not can I change the stand by toggle switch to the back of the amp and put the 1ma VMR pot on the front in place of the stand by switch?
You can do that. We have done something similar with the power switch. Standby on rear will work as well. Good idea.
5. One last question, the shielded cable form V2 and the board, does the shield go the ground on the volume pots?
Only the shield goes to ground and at the Pot end ONLY.