Please help
1. The Suica card can be used to pay for all train lines (including JR lines) and busses?
2. Are JR lines coloured in blue and green?
3. What does it mean when it says 'getting off car 2-4 from the front'? Can only get off in these cars?
1. Yes. Suica and Pasmo and the dunno wat they use in Nagoya and Kansai are all compatible. One card to rule them all.
That said, if you use Suica on JR lines, then you will earn points on JR lines. If you use Pasmo on Pasmo lines, then you will earn points on Pasmo lines. You don't earn points if you use the wrong card. The recommendation is to get Suica because the Suica points are based on how much you spend, and also because you can easily spend a lot on long-distance train rides which tend to be JR lines anyway. Do google more for tricks to maximize points (e.g. use Mobile Suica)
2. No, JR lines come in all colors. There isn't that many JR lines in the Tokyo area tho, not compared to the competition anyway - Once you remove all the Tokyo Metro etc lines the map gets quite bare lol.
Yup, this is it, this is all the JR lines in central Tokyo lol. Quite a far cry from the maps we usually see yea?
Basically in the central Tokyo region, JR lines are just Yamanote (the green circle) and the Chuo-Sobu line that cuts from north to south lol. There's also Keihin Tohoku but that's like running parallel to Yamanote in the east half, this line is meant more for traveling north to Saitama and south to Kanagawa.
If you zoom out to Kanto region it looks better, but take note you can already fit one or two Singapores within this zoom level.
So in the above map, the JR trains do follow their colors. Most, anyway - The not-very-color-coded ones will have a green and orange color scheme, like Ueno-Tokyo line and Shonan-Shinjuku line. The main color-coded lines are - Yamanote å±±ę (green), Chuo äøå¤® (orange), Chuo-Sobu äøå¤®-ē·ę¦ (yellow), and Keihin-Tohoku äŗ¬ęµę±å (light blue). Then there's Yokosuka Sobu which is Blue, Saikyo Rinkai that is weird green... But at this point these are less-known trains.
I added ę¼¢å next to their names so you can roughly tell what/where they are. å±±ę is like the foot of a hill.
3. Trains and train stations in Japan are
*HUGE*. Yamanote train has 11 cars. Thus it's no surprise their platforms (called "home") can be as long as 300m. So when people say "get off car 2-4 from the front" it means that location is closest to the stairs that you'll be taking next.