congrats on the new chinny!
it depends. some of them sleep all the time, some of them are always awake. i've got six and two of them you won't even see most of the time, three are somewhere between and mae never sleeps!
treats - i would not give raisins if he's less than six months old. generally, raisins and other sweet treats are not the healthiest thing around. a daily treat is probably too frequent regardless of whether the treat is healthy or not. i would suggest a daily chew - little willow/vine balls, apple sticks, that sort of thing.
healthy treats - alfalfa hay, rolled oats, shredded wheat, dried rose hips. i would probably give a treat once a week. you also have to be very careful with introducing new food into a chins diet. if your child wants to give him snacks, teach her to give him his normal nuggets - for some reason, the ones handed over to them are soooo much better than the ones in the bowl!