So you want to make money with no money.

Like no money to even have an office? and a legal business?
So forget about products because you will not afford it. You can only give services. What services? depends on your skills or whoever with you on this.

If you have no business Identity, no office, No website, no legal existence..you are just basically wasting your time man. Even in the best case scenario where you succeed, someone with a good capital would come, buy better talent than what you have and crush you.