Unfortunately it’s impossible to know what type of licenses will be required for your specific business until some extensive research is done. Requirements vary depending on many factors – city, county, whether or not it’s a home-based business, the purpose of the business, etc. My company CorpNet does offer this research. Please feel free to contact us for a free consultation at 888.449.2638.
The barrier to entry into the online market is much lower than traditional businesses, which is great. But, it's a double edge sword because the easier it is to do something, the more people try it out. This means that you have to work harder at distinguishing yourself from the melee of other startups out there - because, believe me, there are a lot.