lines of equal longitude, a.k.a. meridians
In general, longitudinal lines run in the direction of the length (longer dimension) of a thing. On a globe or map representing Earth or another celestial object, longitudinal lines run north-south, from pole to pole. Because they meet at two points, they are neither parallel nor equidistant.
The lines of longitude on a map goes from north-south
meridian means the north pole to the south pole and longitude meridians on the map are west.
That is because the map is used with a magnetic compass. Since the needle on the compass points in the direction of magnetic north it is easier to use the map with the compass if the lines drawn on the map indicate magnetic north.
Lines of longitude
The lines going up and down (vertical) from the south pole and north pole
In general, longitudinal lines run in the direction of the length (longer dimension) of a thing. On a globe or map representing Earth or another celestial object, longitudinal lines run north-south, from pole to pole. Because they meet at two points, they are neither parallel nor equidistant.
The Equator is exactly between the North Pole and the South Pole. Look on a map of the world or on a globe.
The lines of longitude on a map goes from north-south
Polar maps usually put the named pole at the center of the map.
No. You are describing lines of longitude.
meridian means the north pole to the south pole and longitude meridians on the map are west.
"Meridians" are the [straight] lines of Latitude (vertical, North-South lines) on a map, and Longitudes are the circular lines (horizontal, East-West) going around the world. So there can not be "Meridians of Longitude" that converge at a poll.
lines of latitude
That is because the map is used with a magnetic compass. Since the needle on the compass points in the direction of magnetic north it is easier to use the map with the compass if the lines drawn on the map indicate magnetic north.
Lines of longitude
Zero, they are pinpoints on a map, nothing else.