Tak bardo chcialbym/ Tak duzo mowic???

What does it mean when 'TAK' is written in sentences such as:
"Czy muszę panstwo tak dużo mowić?" ?
or
"Tak bardzo chciałbym...!"?

I'm guessing it's an affirmation to add emphasis BUT I'm unsure of how it works. And its a bitch to try and translate into English.

If anyone could explain the details and help to clear up my understanding I would be most pleased.

It means so. It's used as an intensifier like we use so and such in English.

Is it really an intensifier?

Well, absolutely, yes

Do you have to talk so much?


So much, I would like...

I would like very much to....

It certainly is so much an intensifier

...but where is 'panstwo' in that translation?

I can relate to "Czy muszę (Must I ?) duzo mowic (much talk)".

panstwo is used when you are talking to a group of unknown people or people who are respected by you etc.
The same with "pan/pani" (adressing to one person): Czy pan/pani mówi po polsku? Do you speak Polish?
It's just a form of politeness. There is no such a destinction in English, where "you" is used for everything

If translating "pan/pani " into English you use: "Mr/Mrs do you speak Polish?"
or "Sir/Madam do you speak Polish"


Small error.
"Państwo" can be addressed as "Sirs/Madams" or if addressing group of people by "you" , "please" should be added to show respect . That's how word "Państwo" works in Polish language. We don't address unknown (or older) people by "ty/wy" (you).

Sirs/Madams do you have to talk so much?
or
Please, do you have to talk so much?

The webs have fallen from my eyes.

my dad left me a message in English but at the end he wrote "DUZO" I thought it meant grandfather

No, duzo means 'a lot', dziadzio means grandfather.