That's a huge list of (basic) questions. I'm afraid you will need to do some more research and narrow down.
Also, if you are looking for essays here, I doubt anyone will be kind enough to post them. However, you may go through various admissions consultant's websites and check out their essay analysis for various schools. You will get a good handle of what needs to be written. Also, there are some books (e.g. Richard Montauk's), which have sample essays. Those should be of some help.
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