Use a BMR calculator… free online. I think this app actually does it for you when you input your stats. (height/weight/age/activity level)

Yes just go here to view that stuff. Luckily the app predetermines what percent your diet should consist of for macros based on your height weight and age

depending on your goal you should have roughly 0.8 to 1.6 grams of protein per lbs of body weight 0.8 if you're trying to lose weight 1.6 if you're trying to gain weight