For meeting points, there are several existing threads with titles like "NRT meeting place in T1?" and "Good meeting point at Narita for UA and TG arrivals" and "Meeting place AT NRT"

If you search for "Narita Meeting" or something along those lines, you'll find those threads, which already cover many scenarios.

For transport to Tokyo (trains, taxis, buses) and what to do about luggage, you can find some information and links in the Master Thread at the top of the forum.