What is the correct response to...

[amigo]

Hi teachers,

1. Can you tell me the correct response when people say "How's it going" to you?
Is "How's it go? " a short form of "How's it going?" ?

2. When people say"Nice talking to u",should u say" me too" or "you too"?

Thx

[Casiopea]

A: How's it going? OR How does it go?
B: Great/Good/Not bad/OK/Pretty well/Pretty bad/Terribly/Horribly (etc.)

A: (It was) Nice talking to you.
B: (It was nice talking to) You, too.

The words in brackets ( ) are optional.

A: It was nice talking to you.
B: (Talking to you was nice for) me, too.