A:AnswerConsumer Cellular is an mvno of at&t and T-Mobile, these companies operate with sim cards. Yes, you can do what you suggested.
https://en.m.wikipedia.org/wiki/Consumer_Cellular
A:AnswerNo it certainly will not boost works off of the sprint Network and sprint is a CDMA network however if you go to boost website or boost store they may have thier own version of the moto g I'm just not sure about that. However if your willing to switch networks i love cricket and it's a great option for the moto g!