Re: arranged marriage
awww! I wish you the very best! As already stated, just be yourself, dont put on any airs or anything. Let the guys see who you really are so that there are fewer surprises after the marriage! If you want to find out whether they're after green-card or your family's money, ask them whether they would live in Pak. And tell them that the family money doesnt come with you, that once you're married, your husband is to do the providing. True or not, it will weed out the undesirables.
As far as asking the questions you feel sensitive about - like how many children, how long to wait before children, whether wife can/should/wants to work.....ask the guy "So what is your ideal of married life? What do you see as the day-to-day in the marriage? What are your goals and ideals in family life and marriage?" This is a really good way of getting down to the details without having to actually ask insensitive or uncomfortable questions.
Best of luck! And let us know how it goes!!