88 is the max weight for the tyre, h refers to the max speed allowed for the tyre, in this case 139 mph.
Yes, they can
No, the 185 70 r14 tire cannot be substituted for a 175 65 r14 tire. The 70 series tire has a larger diameter and is not recommended that you substitute on a 65 series tire.
Yes, they can
Yes, this is an acceptable swap.
185/70-R14
185/70/R14
The Tire Size is 185/70/R14
185/70-R14
Definitely no.
185/70 r14 88 s
No, this is not a good swap as the 15" tire will be too large. Your speedometer will read 58 mph at a true 60 mph. You can use 185/65-15 which is a very good swap.
Only if your rims are 14 inch rims.