Questions about supporting documents

I'm in NY state now, will take GMAT on Jan 20, and apply master of accounting of the coming fall. Now I'm preparing some supporting documents such as transcripts, letters of recommendation, personal statement.

1st question, about transcripts: I had my transcripts made, but there're only subjects and my performance,no credit hours of each subject or average credit. Should I have a new transcript made showing the credit and also calculate the GPA? How should I calculate the credit hours and the GPA?

2nd question, about letters of recommendation: Two years ago, I was applying schools and asked my professor and ex-boss wrote me reference letters, and still have the files in my computer.Do I have to ask them to sign on the letters themselves, or can I have somebody else sign for them?

3rd question, about my degree: my major was Advertising, belonging to Journalism Department, and I got bachelor degree named "Fa Xue Shi", how should I translate it,"Bachelor of Laws", "Bachelor of Juris" or something else? But what I learnt was nothing about laws, it's mainly about business and communication.

Thank you very much.