You can not mix different size tires and rims. The tire has to be the same size as the rim.
12
Yes, if it's a 15" rim, but that is not a Villager tire size that I am aware.
no, the rim size is 2 inches different.
No the rim and tire are too big.
Sometimes, if bolt pattern is same and there is enough room, - but I wouldn't recommend it.
depends on the rim
No. Last two digits are the rim size. A 15" rim certainly cannot fit on a 16" tire and vice-versa.
No, the R15 means that it is a radial tire and the 15 is the rim size. Never try to mount a tire and a rim that are different sizes.
You have quoted 2 tire sizes. -If you want to know w what will fit we need a rim size.
It depends on the tire. It could be made for a 15, 16, 17, etc size rim.
You can use ANY size rim made with the same lug patteren. However ofcoures the larger the rim the smaller the tire. Most if not all tire dealers can tell you the combinations Tire/rim that will fit.