In Toad for Oracle, there is no "Save grid content" that I'm aware of. The menu item is "Export Dataset". And the field labels that you are telling me about are not named that way in Toad for Oracle either. Are you using some other version of Toad? Toad Data Point, maybe? That's a different product, and it has a different forum.
In any event, you could get that data into Excel using Toad for Oracle the way I described before. Toad will put 1,000,000 rows on the first sheet, then move to the next, etc. But you are going to need a lot of patience (and memory) to put that much data into Excel. Maybe we can suggest something better if you let us know what you are trying to accomplish.