A crew has 3 pilots (PPC, 2P, 3P) and 2 NFOs (TACCO, NAV/COM). The NFOs do not sit in the flight station, they have the two seats in the tube behind the flight station, on the left and right side of the plane. As mentioned, they have their own window. For short duration flights, ~ < 3 hours you can have just two pilots. Depending on the crew, you usually do a 1.5 hour rotation, ie you are in the seat for 3.0 hours, then out and in the rack for 1.5, then you are back in the seat again for 3.0, repeat as long as necessary. You can have missions or transits from 7-12 hours long. And that is not even adding in preflight and postflight duties.
You also have two Flight Engineers (FEs, enlisted), who sit in the flight station, one flight engineer sits between the pilots and monitor engine instruments and fuel (they do ALOT more than that though).
The flight station will hold five people in it, so typically for takeoff and landings, you have the offduty pilot and flight engineer sitting in there also.