Phoenix local bus cost $1.25 per ride with no transfer or $2.5 for a full day pass. That means if you also need to ride back home then you better to get a full day pass. There are also multiple days pass, but they are not cheaper than one day pass except monthly pass. For the detail price please see the photo.
You can buy ticket on bus, it takes quarter and dollar bill. On some buses, there is free bus book for you to take. There are very nice bus map including both local bus and express bus, it also has schedule information for all buses. It also available to download online at:
http://www.valleymetro.org/Bus/Bus_Book_Online/BusBook108.pdf
Here are bus maps for Phoenix:
local bus: http://www.valleymetro.org/Bus/Bus_Book_Online/108local.pdf
express bus: http://www.valleymetro.org/Bus/Bus_Book_Online/108express.pdf


