I am a stay at home mom in Westwood, NJ. I have a 13 month old boy myself. Now he is my 3rd so concerning feeding him I felt much at ease the third time around! lol
First of all is he drinking formula from a bottle? If so, you can obviously start by slowly adding cows milk in parts. ie: 1oz milk to 5oz of formula.
That is the easiest. Every 7-10 days add another oz of milk instead of formula.
If you get the Born free training cups they might be the easiest to transition him from a bottle. They have soft spouts for the beginners and you can change them out to harder ones as he begins to grasp drinking from a cup.
Don't stress if he is still drinking from a bottle. It will come with patience and time. All of my children were different. My oldest had a really hard time giving up the bottle. It was 15 months before she did. As long as he has the opportunity often to try the cup he will get it..
Also, when you have a drink, just let him drink from your cup occasionally. That is a great way to get him used to drinking from a cup!! Messy, but great!
I have a Holistic Pediatrician that I see who indicated that at my sons age, even if he was getting 9-12 oz of milk a day, as long as he was drinking water as well that that amount of milk was just fine for him.
So don't worry about getting a certain amount in him. As long as he is eating and has access to water then he is fine!
As I said, my son is 13 months. At 6 months we started giving him our food and by the time he was 9 months he was off baby food.
He was breast fed so he went right to a cup.
He pretty much eats anything we do. He still drinks milk with a small amount of formula in it. He has about 2-4 oz in the morning with breakfast, 4-6 oz later in the day with snack and 4-6 oz before bedtime. The rest of the time he has water and occasionally I give him watered down orange juice.
I would be happy to give you some ideas of foods you can introduce to him that are simple to prepare and easy to chew and swallow for this age.
Good luck and I hope this helps a bit!