Andrew,
I think you have mixed up your engine description - t27 diesel 1.8l avensis build 2013 - but at least your profile is correct. It is a 2litre diesel. I cannot say if the cold starting rev's are normal or not. On petrol, 2000 rpm is normal, and the revs drop quickly if the car is driven. That is why I start up and drive off immediately. The car warms up very fast when driven.
Clearing the side windows by lowering them then raising. I cannot remember with my current car, because I clear all windows before getting in and starting the car as mentioned above. My old car did partially clear the glass, so had to clear them. I did polish the windows so the water runs off quickly.
I am still trying to remember as I type this, and maybe it does clear.
Other hopefully can answer.
Konrad