Transistioning 1 year old?

my son will be 1 april 27, i know im post to stop the formula and go to solid foods, but i have a little problem, my son still eats baby food stage 2 and 3 about 1-3 times a day he has 5 teethe yet they all are still not fully grown in yet, he is still drinking formula, his stomach is very sensitive we had problems with formulas in the past, i have given him 2% milk twice and he doesnt seem to mind, but i was wonderin if they ment they have to stop eating baby foods at 1 too or just formlua, and if it is food my son wont be able to yet, he know how to put food in his mouth and swallow and all that but he doesnt get the concept of when your mouth is full or not taking abig bite. does any one have advice for me on how to switch my son from formula to milk and from baby food to real food? i know he probally needs more baby food feedings thu out the day so he wont need a bottle as much, and also should i heat up the reg milk when i give it to him or leave it cold