need to

Thein Lwin 7291Somebody needed to open the treasure inside Helen.

It's correct.

More information is needed about the context and about what you are trying to say.

GPYMore information is needed about the context and about what you are trying to say.

The context
The director explained, "Helen is a very intelligent child, but she has no language. There's a treasure inside her that needs to be opened."

Thein Lwin 7291The director explained, "Helen is a very intelligent child, but she has no language. There's a treasure inside her that needs to be opened."

That sounds OK to me.

GPY Thein Lwin 7291The director explained, "Helen is a very intelligent child, but she has no language. There's a treasure inside her that needs to be opened."That sounds OK to me.

A treasure inside Helen needed someone to open (it).
Is the sentence possible? Thanks again, GPY.

Thein Lwin 7291A treasure inside Helen needed someone to open it.

This is correct to me.

KhoshtipMan Thein Lwin 7291A treasure inside Helen needed someone to open it.This is correct to me.

If so, is it true that somebody needed to open the treasure inside Helen? Thanks a lot.

I don't know it's true or not, but know that it's correct.

KhoshtipManI don't know it's true or not, but know that it's correct.

The director needed that someone would open the treasure inside Helen.
Is this sentence correct? Thanks again.

Thein Lwin 7291The director needed that someone would open the treasure inside Helen.Is this sentence correct? Thanks again.

No. You can say "The director needed someone to open ...".