score:7
I live in Bogota.
Let me start with your statements.
True all the above.
The one that you buy on the station will work anywhere, it was a caos before because of those colors but they are a bit smarter now.
True.
As soon as you have the money on the card, any number of people could use the same card, you will have to use the card each time a person enters a station
False. Of course if you go to charge your card at rush hours it can be bad, but at a good time it shouldn't be more than 10 minutes, besides, you should charge enough for a few days so you don't have to be doing those lines
About your questions. Can I pay with credit card, or do I need to have COP cash? You have to pay with COP cash.
What identifies the counter I need to line up on (maybe it's obvious, but I'm rather prepared)? Every time you enter a station you will find one or a few counters, they all do the same, just do the line, you have to tell the person how much do you want to charge and you let them know you don't have a card, you can say: "No tengo tarjeta. Quiero una con 50.000 COP, por favor", which means, "I don't have a card. I want one loaded with 50,000 COP, please"