I'll tell you what you're going to need as a start up:
1. Computer(Can be Laptop)
2. Fax Machine
4. Internet connection
You can choose 4 or all in these items so you could save on expenses.
Another thing you should consider is renting a warehouse or building your own warehouse beside your house so you could stock your rice sacks. In choosing your vehicle you can start by buying one jeepney. I prefer second hand jeepney to save expenses.
Looking for a rice supplier, I can only suggest the yellow pages or you can just look it up in google just type "yellow pages philippines."