Walk times have been mentioned a lot but probably not in one single list for everything; also times vary for whose doing the walking. Ones we have done more than once at casual pace without small kids:
BLT to MK: about 10 minutes
BWV to Epcot (International Gateway entrance): about 10-12 minutes depending on where your room is
BWV to Studios: 20 to 25 depending on where your room is.
BCV to Epcot (International gateway entrance) : about 8 minutes
BCV to Studios: about 25 to 30.
All the above could be quicker if you walked at a more brisk pace than we do and slower if you have small kids.
I have also done the Poly to TTC walk but it was so long ago I don't remeber how long it took. Though I have stayed at GF, I never found a reason to walk to TTC from there.
SSR to DTD can vary significantly depending on where your room is, which of the two walk paths to DTD you take, and where you are actually going. The shortest walk, about 10 to 15 minutes is Congress Park area to the main (eastside) DTD area which is currently blocked off for construction. OKW to DTD would also have large variances and I have not done that one.