Items 1,2,3 somehow points to a faulty ignition switch. I had that
problem before and replacing the ignition switch fixed my problems.
However, I don't know about the gearbox fluid warning. You should have
it diagnosed. There may be a chance that it is also caused by the
faulty ignition switch. I remember getting different dashboard
warnings also like the airbag warning light, and the brake lights
(intermittently) while getting symptoms 1,2,3. The ignition switch
replacement seems like a DIY thing. I remember seeing it on the web
but couldn't remember where.