we turned everything back on
What made you think you needed to? As it is in the photo, everything is off because the mainswitch is off!
Clue: The rule is, if its pointing DOWN and GREEN its OFF. This is why you have no power.
Generally when something trips, only the one switch will be off.
PS. lovin the cheap and tacky technicolour rockers which actually mean nothing when theres a mix of old and new breakers.