Yes, but check carefully for steering clearance
Yes, you can.
It depends on if you have the clearance and the tires don't rub the inside of the fender when turning.>Al
As long as all 4 match, the height difference between 65 and 70 should not cause a problem on most vehicles.
Yes, that is a pretty good substitute.
You can substitute these tries if need be. But if you do this your car will be off balance.
no
Yes, you can substitute the 205/75-15 for the 215/70-15.
yes
Yes, they can
Yes, they can
Yes you can
Yes, you can