Hey Paul,
Looks like you know the important questions to ask 
Airline pay starts out at about ~$20k at some regional carriers, although the average first year pay at most regionals is a little bit higher nowadays. It is very hard to give you an accurate number because it depends on a lot of factors such as which company you are at, how long you have been with the company, what position you are holding (Captain or FO), etc. Airline Pilot Central has a bunch of information on each airline and you can get a pretty good estimate on pay.
ATP’s Fast Track program was designed to get you from zero time to being a CFI (Certified Flight Instructor) at a fixed cost and in the minimum amount of time. You have two options for the program, one including 100hrs multi-engine time, and the other with 40hrs multi-engine time, both leave you with the same exact ratings. The price difference is $13k between the two. You can check out this thread for the pros and cons of each program.
Yarden