You can use the ref=* or name=* tag to enter the route number for a bus route, depending on the situation. However, you must add the entire route for this. For details, see: https://wiki.openstreetmap.org/wiki/DE:%C3%96ffentlicher_Verkehr#Tags_in_der_Relation_zur_Erfassung_von_Verkehrslinien_und_Kursen_sind:

I don't know if a photo can be added for the departure timetable. However, if there is a timetable at the stop, you can add this information using the departures_board=* tag: For details, see:  https://wiki.openstreetmap.org/wiki/DE:Tag:highway%3Dbus_stop