Nope. the "15" is the size of your rim. 15". So a tire with a 15" opening wont fit a 16" rim. but you can put larger tires on the 15" rim.
Not familiar with chains as to whether they have any adjustment or not. There is only 1/4" difference in height between the two sizes you have listed. If you can tighten the chain up a bit, they should work.
225/75R15's are stock Alternatively 235/75 and 235/70R15 will work.
Tire size is 235's. That is the stock size.
A 235/60R16 tire will not work as a direct replacement for a 235/70R16 tire due to differences in overall diameter and sidewall height. The 235/60R16 has a shorter sidewall, which affects ride quality, handling, and speedometer accuracy. Using a tire with a significantly different size can also impact vehicle safety and performance. It's best to stick with the original tire specifications or consult a professional for alternatives.
Tire size is 235's. That is the stock size.
235/70/r15
235/75/15
235/75r15
12
Yes they will tire size will be 235/30/22
The Standard tire is 235/45/17 and the optional tires are 235/40/18.
235-70-15 or 235-75-15