moxie!
i'd play it safe and wear the black suit, standing out from everyone else by what you wear can also go against you.
basically the first question is just asking, do you know from the CEO of the company or the general manager of the company down all of the management levels and where do you fit in? I was asked this one in my final interview two years ago.
the second question just wants you to tell them when have you maybe changed a procedure of doing something at work that makes things easier for everyone else and maybe even benefiting the customer. This one isn't hard, it doesn't have to be huge, just think of something you've changed at work, why you changed it and what the result was?
Good luck!
Oz