This thread is a year old, things have changed!

You can assume that you MUST have the ATP written prior to interview since you'll take the ATP checkride during training.

Most people score mid to high 90's. Since the answers are available, that's kind of assumed. If you scored much less that will raise questions. You can retake it for a higher score.

I would assume that you'll need at least 50-100 ME depending on the airline.