Generally speaking, no. Why? The size of the tire is increasing both in width & height. These dimensions play a part in clearances/tolerances between mechanical parts such as your brake calipers, strut/shock set up, & wheel well clearance. Always consult a tire dealer specialist, their advice is usually free of charge.
Yes, that is a pretty good substitute.
Normally. yes.
no there is too much height difference
Yes, that is reasonable as long as both sides match.
It is an acceptable substitute, but know that your speedometer will read 58.7 at a true 60 mph.
215 65 r 15 or 205 60 r 15
no
Yes, they are only slightly different.
Yes, they can
Yes, but check carefully for steering clearance
Yes, this is a good alternative. Your speedometer will be only be 0.6 mph too fast.
Yes, they can