What type of people would I need as partners if I were to start an online business.?

[Dee]

Since you already have an idea, you need to hire a company to make it realistic. Have someone create a website, better if they can collaborate with website engineers like Blue Snap http://bluesnap.com/ (this is what our company did.) Once it's all set-up, you need to broadcast your business online, reach out to web users or target market. In order to do so, you can be creative with social media marketing, learn each platform and work on enticing the users to visit your website. This of course will take up so much of your time, it is always a good option to hire a social media/PR marketer.
Also remember to build your website under Google's guidelines to gain good points in the search engine. However, that will be the least of your problems because the website engineers will take care of that for you.