Hey Bruce,
Here are my answers to your questions, based on my experience in Portland, OR:
Tone: You should be able to find tone online. You’re looking for minus 20dB.
I’d consider Vegas’ master levels meter a “true” meter. You’ll want peak levels at minus 10bB.
I use volume envelopes, too. Also, John Rofrano was kind enough to set me up a long time ago with a nifty master preset, that keeps audio all tucked in to where it needs to be. I can send you that doc if you’d like to have it.
You should be fine just using the “Broadcast Colors” VideoFX. In twenty years I’ve never used a scope and have never had a spot rejected, so I wouldn’t sweat it too much.
For 16:9 stuff, I’d recommend you ask them their requirements for what they call “safe area”; some stations here letterbox to get their SD 4:3, others do a centercut (which I still find completely frustrating… wouldn’t want to actually be able to USE the widescreen format).
Hope this helps,
–Kelly