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http://www.mta.info/nyct/maps/submap.htm the link should direct you to some good MTA maps available. It's also got a variety of options as which routes to take. And as always with a trip happy travels.
they are not always correct
Itself
North is always "up" on maps.
Some maps making progress are the maps of space. We are always finding new planets.
No, usually only on topographic maps. Other maps (e.g. street map, road map, voting districts map) have no use for them.
google maps. well it depends on what you like but google maps is easier and better all around
You have to put the maps in the correct folder which should be starcraft/maps/download well anywhere in the maps file will work
In most conventional maps that direction is North
East is the direction that is always to the right on a map, as maps are typically designed with north at the top. This means that as you face north, east is always to your right side.
I don't have a satellite navigator myself, but I have been using G maps, and I have to say that G maps isn't always accurate. I have found roads that weren't yet on G maps for example. If I were you I would get a satellite navigator, because I would think it would have the most updated maps available.
Mapquest.com should be good