Hi D.,
My baby is 7 months now. She drinks anywhere from 12oz-16oz a day. It might be a bit more since she drinks during the night for a feeding at 1:30am and then again at 5:30am. She is also a pretty healthy eater. She gets three meals a day. Veggies, fruit and cereal. I would say she gets about 3-4oz of food at each serving. I make her food and freeze them in 1oz cubes.
I believe it is normal for babies to drink less milk once they start eating solids. They get most of their nutrition from your breastmilk but they are getting the calories from the solid foods. This is a good and necessary thing. It's another stop on the road to your baby growing up. It happens fast!
As far as a daily schedule, it's hard to do this when you're not home with your little guy. You have to relinquish control of your baby's schedule to your daycare provider. Hopefully, you'll be able to work with her to establish something that works well for everyone.
Since you just started daycare, it's going to take some time for everyone to get used to the new schedule. Right now, I would just focus on getting him used to being with someone new during the day. Keep your schedule consistent. Your routine with him in the morning should be consistent as far as wake up, nursing, drop-off, etc.
Ask your day care provider if she can provide a more consistent structure for your son. All children love structure, routine and predictability. Once he realizes there is one, he will fall into place.
One thing to remember, his sleep schedule is going to vary depending on if he is teething or sick or just feeling funky. You can try to put him down at a regular time but it may not work out. Watch how he behaves and he will tell you when he is sleepy. Usually, after a few hours of play, he should want to go down for a nap. But my daughter went through a period where she would only nap for 20 min at a time - and that was only when she was drinking a bottle or on the breast. She had some teeth coming through. Now she has a regular napping schedule.
To wrap it up, have a structure but be flexible within your structure. Good luck to you!