There are two taxi stands just outside of Grand Central - at E42nd and Vanderbilt and E43rd and Vanderbilt - across the street from Grand Central.
No, it leaves from Grand Central Terminal. The Scarsdale station is a Metro-North station, on the Harlem line. The terminus for Metro-North trains is Grand Central, not Penn Station.
Grand Central Station & Terminal are located at East 42nd Street between Park and Lexington Avenues. Grand Central Station is the subway station, where you can catch the 4-5-6 (the dark green line, aka the Lexington Avenue Line) or the S shuttle train to Times Square. Grand Central Terminal is the railroad terminal, for trains that are not part of the New York City subway system (like MetroNorth commuter trains).
According to Wikipedia and the MTA themselves, 77 of New York City's subway stations have working bathrooms, and 28 of these stations are in Manhattan. However, according to the Related Link (see below), in Manhattan, only 8 of these stations are actually functioning and open to the public (9 including "the developer-financed wonder bathroom at the Times Square Station"). The only one on the 6 line is the Brooklyn Bridge-City Hall Station. There are also bathrooms at Grand Central Terminal, downstairs, near the food court. The 4-5-6 line stops at 42nd Street-Grand Central Station, but Grand Central Station is the subway station, while Grand Central Terminal is the railroad station. So, you would have to exit the subway system to use the bathroom, and then pay another fare to get back on the subway.
The S shuttle train (color code grey) runs between Grand Central Station (at East 42nd Street) and the Times Square Station (at West 42nd Street).
Grand - CTA Red Line station - was created in 1943.
Central - CTA Green Line station - was created in 1899.
Central - CTA Congress Line station - was created in 1961.
Central - CTA Congress Line station - ended in 1973.
Take the Uptown 4 or 5 express trains (of the 4-5-6, the dark green line), 1 stop, from 14th Street-Union Square to 42nd Street-Grand Central Station.
I don't understand your question. What is "B icon?" Are you asking how to get to the B train from Grand Central Station? That's the only thing I can think of. If that's not what you meant, then please ask your question again and clearly indicate what you mean.You can take the Manhattan-bound 7 train (the purple line) one stop, from 42nd Street-Grand Central Station to 42nd Street-Bryant Park, and transfer at Bryant Park to the Btrain (which is on the B-D-F-M, the orange line).If the 7 train is not running (there has been construction going on, off and on), then I would just walk to the Bryant Park Station. There are other routes you can take, to get from Grand Central to the B train, but it would be much simpler and faster to walk.Grand Central Station is at 42nd Street between Park and Lexington Avenues. The 42nd Street-Bryant Park Station is at 42nd Street and 6th Avenue, which is 3 or 4 avenue blocks west of Grand Central Station (depending on whether you exit at Park or Lexington). From east to west, it goes: Lexington ---> Park ---> Madison ---> 5th ---> 6th.
Wood Lane - Central line - tube station was created in 1908.
Wood Lane - Central line - tube station ended in 1947.