Yes, It will work but your speedometer will read 58.7 at a true 60 mph and you will have slightly less power that you will probably not even notice. A better swap would be a 215/70-15.
yes
Yes it can.
If there is enough clearance for the wider tire, yes.
If they have the identical aspect ratio and wheel diameter as comparing a 215/70-15 to a 205/70-15 the 215 tire will be .56" taller.
No, it will not.
NO, this would be a very bad swap. Your speedometer would read 57 mph at a true 60 mph, and handling, ride, steering, traction, power, and mpg would be adversely effected. A 195/60-16 would be an acceptable swap.
Yes, you can but know that your speedometer will show 61 mph at a true 60 mph. The vehicle will also handle differently.
The width, by 10 mm
Yes
NO, absolutely not. Never, ever, mix tire sizes on the same axle. You could put a set of 215 on the front and then a set of 205 on the rear but not a 205 & 215 on the same axle. Tires on each axle must be the exact same size.
I doubt it as there is 2" difference in diameter.
If you go to a 215/60-15 your speedometer will read 58.8 at a true 60 mph. Your performance, handling, and ride will also be adversely effected. Your decision.