When something ends or when you end it, it stops.
The current agreement ends on November 24.
He wanted to end their friendship.
If you end with something, it is the last of a series of things that you say, do, or perform.
He ended with the question: "When will we learn?"
The concert ended with a Bach sonata.
If you end by doing something, it is the last of a series of things that you do.
I ended by saying that further instructions would be given to him later.
The letter ends by requesting a deadline.
You use end up to say what happens at the end of a series of events, usually without being planned. You can say that someone or something ends up in a particular place, that they end up with something, or that they end up doing something.
A lot of computer hardware ends up in landfill sites.
She was afraid to close the window and ended up with a cold.
We missed our train, and we ended up taking a taxi.