Looking for serious advice

Guys,
I got introduced to a startup in Education space by a friend. My friend has told them that I know IM and I had a meeting with them today and closed the deal. They are a new startup and they want me to handle all of the IM part — right from website design and development to SEO and Social Media. They want a road map and an approximate cost. I told them I will get back to them in two days. I seriously have no idea how much I should be charging them. While I can take care of all website…

Looking for serious advice