I think these passes would be good for you.
- Toei and Tokyo Metro One-Day Economy Pass --> Both Toei and Tokyo Metro
- Tokyo Metro Open Ticket --> Tokyo Metro Only
- Toei One-Day Economy Pass --> Toei Only
If you are planning to use JR and private lines as well, try Tokyo Free Kippu (1,580 yen). This is good for Toei bus network too.
For more information on JR passes, refer to my posts in this
thread.