Drop off at the police station, deliver myself and/or call the owner, whichever is least effort. Leave the money. The other way around, if someone did the effort to bring me my wallet back, and the money would still be inside, I might offer them something for the effort.
I found a cell phone in San Fransisco a couple of years ago. I called "home" with it, getting voicemail. The owner then called back and came to pick it up at the beach where we found it. He then gave us a ride around town, since we relied on public transport and had to wait for him to show up, and offered 20 dollar. It was a nice experience.