There is more information on Muni at
www.sfmuni.com .
The one-way ride fare (including free transfer) is only $1.25 for adults 18-64. Seniors (65+), youth (5-17), and disabled pay only 35 cents. On the cable car, the fares are higher ($3.00 adult; see website for further details).
Rather than a pass, you might find buying tokens more economical, depending on your situation. A bag of 10 sells for $10.50 (no expiration date), i.e., only $1.05 per ride. (But on the cable car, where an additional payment of $2.00 is required, there is no savings!)
There is a Muni kiosk at the foot of Powell and Market Streets (next to the cable car turnaround) where you can buy tokens and passes. Also, the SF Convention and Visitors Bureau nearby (down the steps) sells Muni passes.
Kathy
[This message has been edited by KathyWdrf (edited Dec 20, 2003).]