Hi there!
1. Six or Seven ounces per bottle is normal. My LO was only taking 5 ounces at that age, but she was a fussy eater.
2. A lot of babies spit up. Is is projectile vomiting or just a bit of spit up? Does it seem to bother her or not? If it bothers her or is projectile, I would take with your pediatrician. He or she may be able to reccomend a better formula.
3. I started giving water when i introduced a sippy cup around 6 months. Otherwise, I never offered water unless my LO was constipated. But, like the previous poster said, water is not a bad thing to give.
4. Can't answer this one. If no one answers we can post the question on the breastfeeding forum. I'll check back in to see.
You posted as I did! Other signs of intolerance would be gas, diarrhea, constipation, or new rashes.