-For an Italian bb, possibly Loctite is warrented. Maybe not essential but can't hurt.
- Either make tool is fine. Park tools are excellent quality so buying the official Campy tools isn't of any benefit.
-I'm enamoured with torque wrenches. I use them ever since I tightened a bottom bracket VERY tight and then used the torque wrench and got another 1/4 turn. Sheldon Brown to the contrary, torque wrenches are very useful for bike mechanic who doesn't work on them every day and hasn't developed a calibrated arm.
- If the bb is a sealed cartridge unit, no extra protection is needed. If it's a cup and cone, one of the plastic bb sleeves would be worthwhile.