To see who has officially filed and find any related forms, click here. Under the yellow boxes, you will see "Browse Candidates & Measures by Election." Click the 11/04/2014 tab and then the Mayor - City of Oakland tab to expand.
The best place to learn about campaign finances is this website, created by John Osborn, which has already crunched the numbers for you.
The Law
Oakland law sets strict limits on how much each candidate can raise per contributor and spend overall. Below is a list of the limits: (read complete rules here)
Individuals and Entities
If Candidate DID NOT agree to expenditure ceiling: $100
If Candidate DID agree to expenditure ceiling: $700
Political Committees
If Candidate DID NOT agree to expenditure ceiling: $400
If Candidate DID agree to expenditure ceiling: $1,400
Candidates who pledge to limit spending cannot exceed $405,000 in spending during the race. If an independent expenditure committee spends a total of $104,000, it eliminates the expenditure ceiling for all candidates in the race. This happened during the 2010 Mayoral race.