I will do this for you because you asked very politely! And I am from England so I can understand clearly. The only reason you missed a couple of things is because of the accents!
I will put [ ] around the things that are WRONG, then I will write in the correct words:
Boy: I don't wanna marry that!
Girl: I don't wanna marry YOU! [I just said no.] "I'd-a said no."
-- This is the English accent. She actually is meaning: "I would have said no." but it gets shortened to, "I'da said no".
From correct English, down to what she says:
"I would have said no." <-- Correct and formal speech or writing.
"I woulda said no."
"I'da said no." <-- Slang. People usually talk like this :)
Boy: Yeah, right! Of course you [did!] would! (He means: Yeah, right. Of course you would HAVE SAID NO, IF I HAD ASKED YOU.)
Girl: Aoh! Don't dis me in front of people. [I just said no.] I'da said no. (see above)
Boy: Why? I'm a catch,
Man: He is
Boy: [I'm a hootch, I'm a pimp] I'm a hoot, aren't I Pam?
("I am a hoot" means "I am fun to be around" or "I am a funny guy". Pam (Pamela) must be the old lady.)
Woman: Well, yes. But, [you know], you're not everyone's cup of tea darling (?)
-- It means, not EVERYBODY likes you. Sometimes people say, "Yes it's good, but it's not my cup of tea." which means "It's good, but I personally don't like it". It's an English expression. You won't find it in other countries as far as I know.
Boy: Yea[h] Bu[t] ....... have a choice, chooses, I mean [if] have you've looked in the mirror recently, [you're not allowed ....... doing .......] you look like you should be in Amsterdam doing tricks with Mars bars.
-- Amsterdam is known for having girls behind a shop window, doing sexual things (in the prostitute area). A "Mars bar" is a brand of chocolate bar. "Doing tricks with Mars bars" means doing something naughty with a Mars bar (watch his action when he says it) ...
***answer too long - 2nd part below***