With my older daughter, we were given a set of bottles (Playtex vent air). She wouldn't even touch them.
We went and got Dr. Brown's bottles (which both of my sisters had recommended) and she went to town. Never got colicky, hardly had any gas. You can put some cereal in them and use the y-cut nipples too. You could try the Avent bottles (as long as it's the ones with the valves) - my sister-in-law has a thing for using avent bottles, and my nephew had issues feeding until they switched to the bottles with the valve in it - helps releive the air pressure.
You might trade off on the cereals - if rice cereal isn't working, try using the "mixed" cereal. I wouldn't use the oatmeal in bottles - gets too thick. BUT I've noticed that our daughters had preferences - our older daughter liked the mixed cereal better - while our younger daughter liked the rice cereal better. But at first, go light on it.