Yikes, yes you need to report each sale. There are ways to report a lot of sales. I'm not sure how that all works or if you need to declare being a day trader. Someone else will have to help on that.
A realized gain or loss is one you got from selling the shares. Unrealized would be just the market value change in the account. You haven't sold and taken the gain or loss out.
MFS means Married filing Separate. It's your filing status. If you are married you either file a Joint return or separate returns.
