OP/ R11, I'll answer only the questions I can, since I have a lab and not a pit.
I let my dog pee quickly at 5 a.m., then feed him breakfast. About 20 minutes later, he's ready to poop, so we go for a 15-20 minute walk. Then, around 7:30, I walk him the half mile to daycare, where he spends the day. At 5:30-6:00 pm, I pick him up from daycare to walk home, and he poops again. He has dinner, then some petting and a nap. At 9:00 pm, he gets a walk (10-20 min), then a snack, cuddle and bedtime. On the weekend, no daycare, but fetch sessions several times a day.
Because he is at daycare all week running around, and playing fetch all weekends, he wears down his nails and doesn't need clipped. Short haired dogs don't need much in the way of grooming, other than that he swims most weekends at the beach.
I give him a bone (cow femur) most weekends, which helps clean his teeth. He is 5 1/2 years old now and will need his first teeth cleaning soon and hopefully not too many times after that.
I use Innova dog food, but there are many good brands. Look at the ingredients. Are the first two or three meats (and not "meat byproduct" e.g. beaks)?
Crate training is SO important as a pup. My dog rarely uses a crate now, mostly when there is a thunderstorm and he wants a safe place, or the house is too crowded and noisy. But it's important for him to have a safe retreat, and to have a place to go enjoy if you need some free time away from him.
Enjoy your new friend. He will be worth every minute, and every cent, put into him.