How can a businessman get funding?
By seeking for funds from family & relatives or from financial institutions.
A great product, market research, team (if required) and financial plan. All in all, described well in the business plan.
Also, a beautiful presentation with the capacity to answer questions quickly, efficiently and with much needed enthusiasm.
Above all, you need to have great communication skills. Otherwise, no matter what you may have, if you cannot engrave it in the mind of your investors, funding is going to look bleak.
On the other hand, if you simply go for grants, then it's all about paperwork - which varies from country to country, depending on the programs available.