I'd leave the anti corrosion spray on certainly, my bike is acf50d all year round, maybe wipe away any excess if you were very liberal with it prior to storage.
Oil wise, people will all have their views, every vehicle I have ever owned has had oil changed every 12 months (I've never exceeded the mileage interval within the time interval). I do generally stretch or shorten my first service to get the annual repeat near the start of winter though so it's stored with fresh oil ready for next year. I do have the luxury of a nice warm garage though so winter storage isn't as major a consideration I guess.