I'm not a teacher.
Do you have a copy of the prompt or question you're answering?
On average a 5 page essay is about 1500 words. 8-9 paragraphs give or take.
1000 word long intro would mean you are writing one paragraph that is almost 5 pages long.
Intro paragraphs answer three questions:
: What am I writing about?
2) Main ideas
: What are the main ideas/concepts?
: What am I proving?
hope this helps, good luck