Hi!

I'm South American (think Uruguay/Chile/Brazil/Argentina) with an LLB from my country and currently pursuing an MSc in Finance from my country, too.

Work:
I have 2 years of experience as junior associate in a Top National Law Firm and want to break in US IB by doing an MBA. I also worked nine months in two different counties in law related jobs while doing undergrad and MSc International Exchanges and six months in an internship at a local court. Now I'll spend a year working on consulting in my country in a middle size and not well known firm while I send my MBA applications and wait for the results.

Extracurriculars:
I had been in two student associations during the LLB, did an exchange program in an important university (think Australia, NZ, Netherlands, Singapore), been a teacher assistant in one undergrad subject and took an additional law diploma during undergrad in a topic related to Technology Law.

I also did another exchange program during the MSc in a great university (think France, Denmark)

My questions:

1) Are my non-US LLB and MSc GPAs reportable? I think they are equivalent to 3.5 and 3.3 (USA System -not 100% sure-) / 2:1 (UK System)

2) What are my chances for MBA Programmes at Harvard-Stanford-Pennsylvania-Nortwestern-Chicago-Columbia-Cornell-Duke with this background? Haven’t taken GMAT yet, but which should be at least my minimun score to be a good and realistic candidate for these schools?

3) What other options should I consider if my profile isn't enough for MBA mentioned?

4) What are my chances of obtaining a scholarship?

Thanks a lot!

Unless there is something else you have not mentioned, you are not a competitive candidate at these schools and your goal is highly unlikely via this route. 

Ok. What universities should I apply if those options are not for me? Thanks

I think you need different goals. 

To qualify to an MBA Program, you need to get your certificate or degree evaluated through the World Education Services and ask your university back home to communicate with your universities of choice for other requisites. If you have limited or insufficient budget minimize the choices of universities.  You can attain your main admission assessments at your own pace such as GMAT, Toefl, and so on. 

The challenge for this person is not admission to an MBA. The challenge is that their background currently does not fit the profile of people recruited by those top schools.