Does IKEA have stafff/help to assist customers install their products?

IKEA doesn't do any assembly themselves. But they can help you get in touch with a service that will. IKEA uses TaskRabbit, but you could find someone locally on your own. More info is in the customer service section on their website. https://www.ikea.com/us/en/customer-service/services/assembly/

No. You have to do it yourself, but there is a instructional booklet and a customer service phone number inside your boxes