I just wanted to know if the following word choices are possible.

1) I spend 5 Euro (or Euros?) a week on phone calls. I'm a Tim subscribed.
2) How can I express the fact that you "I have been a Tim subscriber for two years".
3) I have got a Facebook account to keep (is it possible?) in touch with my friends around the world.
4) He set sail for the Archipelago Islands.
5) The ship is nearly swept away by the big waves.Though badly damaged,they manage to sail for five days and nights.
Then, the ship is hit by another ship and the narrator is thrown on board the other ship.

1. Euros <<5 = plural

I don't understand the second sentence here.

2. I have subscribed to Tim for two years.

3. delete "got" and, yes, "keep" is fine.

4. OK

5. OK

Let's go through each question and assess the word choices:

1) I spend 5 Euro (or Euros?) a week on phone calls. I'm a Tim subscribed.
To express the currency "Euro," you can say "5 Euros" instead of just "5 Euro."

2) How can I express the fact that you "I have been a Tim subscriber for two years"?
To express the fact that you have been a Tim subscriber for two years, you can simply say, "I have been a Tim subscriber for two years."

3) I have got a Facebook account to keep (is it possible?) in touch with my friends around the world.
The word choice "I have got a Facebook account" is grammatically correct, but it is more common to say "I have a Facebook account." And yes, it is possible to use Facebook to keep in touch with friends around the world.

4) He set sail for the Archipelago Islands.
The word choice "set sail" is appropriate when referring to someone beginning a journey by boat. Therefore, the sentence "He set sail for the Archipelago Islands" is correct.

5) The ship is nearly swept away by the big waves. Though badly damaged, they manage to sail for five days and nights. Then, the ship is hit by another ship, and the narrator is thrown on board the other ship.
The word choices in this sentence are appropriate. "Swept away," "badly damaged," "sail for five days and nights," "hit by another ship," and "thrown on board" all accurately describe the events happening in the sentence.