Rebecca, there are so many variables that go into this answer. There are many bus routes through the city. The good news is that they all make it easy for our residents to commute. Some obvious answers to your question are that there will be people waiting at the stop infront of your home. There will be some noise and exhaust from the buses passing. The city will plow the streets quickly so that the buses can get through, and depending on what street it is, your sidewalk may be cleared for you, but that is a long shot.
Please feel free to contact me if you have any other questions. I have been in Newton for a long time and have a good sense for the many neighborhoods we have here.