If you get a FP for TSM, it does not push back the times on your other FP's. It only pushes back the time when you can obtain another FP. Usually you have to wait an hour or so before you can get another FP. It will print a time on the FP when you can get your next FP. When you walk up to a FP machine, the return time for that particular attraction is displayed up top. So what ever time it's displaying at the time, will be your return time.
As far as what would be your return time if you're not first in line, it all depends on the season and how fast the FP's are being distributed. We went last October and got to the park at 10 am. Went straight to TSM to get FP's. Our return time was already at 3:30 pm. When time came to get our next FP's, we got FP's for RnRC and our return time was 1:30 pm. Hope this helps.