Hello Vster541, thanks for your question.
1) I think either approach could work for you. Regardless of whether you opt for a paragraph or bullet points, I think 250 words is enough space for full sentences.
2) My best guess is that you are only obligated to list institutions at which you took courses toward a degree. It’s your call in terms of listing your post-undergraduate courses. Many applicants use these classes to their benefit (e.g., showing that they are solid in math), so mention this work need not be to your detriment necessarily.
3) I would accurately list your salary and bonus. The information you list will be verified by a background check, upon acceptance.
Best of luck,
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