I'd find the same or better suppliers as your direct competitors do, who are willing to sell your their products for the same price or even cheaper. Or unique suppliers with unique products, either local or in China or such an 'offshore' country.
You certainly need a website if you want to run an online business. That's either your own site with its own software (installed and maintained by you, possibly bought from a website development company), or your own site hosted by a specialised hoster who offers his own software as a service (you only have to customise and fill it) or, well, just a shop on eBay. Prices vary between (nearly) free or 6 digits (in USD), your own shop in eBay certainly is the cheapest.
I want to start an online business where I can sell daily use products(not consumables). Where can I find reliable suppliers for this? Do I need to set up my own website? How much would it cost?
I also came across an intro mail about www.whatcouldisell.com which claims to do this. Can this help me?