9/10 the subway is the best most of transportation. The subways are safe, cheap and often way faster than a cab! Use google to search for directions and it will give you subway directions.
Well, this is a challenging question. Sometimes it feels like the start of spring so 60s and chilier at night... and other times is still feels like Winter and brings a true blizzard. Check the weather the week before to get a sense of the temperatures.