By mounts, do you mean you have the JZX mounts? The 2jz ones will NOT work in the cressida. You say USDM 2jzgte, so I'm guessing Supra (since that's the only one we got over here), if it's from a supra you need a new oil pan and sump, since supras are mid and you need front sump. Are you planning on sourcing a 6speed transmission for the swap or drop down to a 5spd (pretty sure the 5spd will work on the 6spd ecu). You will also need intercooler piping, and possibly an intercooler.
You don't need a whole new driveline, all you need is transmission and possibly driveshaft, you can get away with your stock diff.