Correct sentence

They're both ok but it's more polite to say "my brother and I..".

Do "go to the sea" and "go to sea" have the same meaning?

No. "go to sea" means "to become a sailer".

U can use both of them. No wrong with grammer.. But second one is different about emphasis..

You are right, I agree cherry_ms..

Yes, both are possible, but do you understand the difference between "go to the sea" and "go to sea"?

@Ivanhr: And what does "go to the sea" mean? Does it mean "go to the sea, but not as a sailer"?

@Grammar Geek: What is the difference?

if you use "the sea", it means you go to sea where you always go.. but if you use just " sea ", you go to sea where is anywhere..

No, that difference is completely incorrect.

If you "go to sea" you go out in/on a boat, onto the ocean. You plan to sail (or motor) around in the ocean. It implies it's a trip of some length. If you're spending the day sailing around in the bay by your hotel, you have not "gone to sea."

If you "go to the sea" it simple means you go on a vacation/holiday by the sea side.