0.04% while in actual physical control of a CMV, and that's federal law, applicable to the whole of the United States.
Move to Ohio, establish legal residence there, go to the DMV with your PA licence, medical card, and proof of your residence in Ohio. Pay the fee, smile for your photo.
The answers for every state's CDL tests are found in the CDL handbook. If you're not willing to study it and learn these things, well, it's probably for the better that you don't get a CDL.
Yes
no because you guys are in the legal age limit.
True
Not in Pennsylvania, nor any other state.
Yes. However, your chances of finding employment as a CDL driver with a felony conviction are slim, and you won't be eligible to receive a Hazmat endorsement.
Whatever the employer pays their drivers.
Yes, it will be reported to New York DMV. While points do not transfer from SC to New York on a regular license, a SC speeding conviction will be recorded on your CDL and could be used to suspend it.
age 21 limit is .7 while driving
It's 17 in PA.
A CDL is not required until the passenger capacity reaches 16 persons or more (this includes the driver).