Is it important to have a computer for learning code in real?

Answer 1

No it's not that important if you are learning mainly computer/laptop gives you some professional experience of ide
But you can learn from mobile and in sololearn many started from mobile

https://www.sololearn.com/discuss/1521115/?ref=app
https://www.sololearn.com/discuss/246485/?ref=app

Answer 2

it depends,

code for fun, no.
code professionally, yes.

Answer 3

No, you don't. But computer is recommended.