Yes, if you mount as a pair. Both tires on axle must be the same
Yes, you can
Possibly, check they don't rub anywhere while steering.
NO, rim size is incorrect.
195/70-16 or 215/65-16 are both acceptable substitutes.
Yes, they can
Yes, you can
Yes, that is a pretty good substitute.
Normally. yes.
You can substitute these tries if need be. But if you do this your car will be off balance.
no there is too much height difference
Sure, if you change all four; the difference is about a quarter of an inch in diamater.
You must mean 205/70-15 as there is no 206 size. The answer is no, as you will be going to a tire that is over 5% larger in diameter. Your speedometer will be off 3 mph. You can however substitute a 215/65-15 or a 195/75-15