If you dont ask, you wont know. Right let see wot i can do.
1.No the dog does not still NEED to be with its mother at this age, though some people say that it should be until 8or9 wks. Ive had both mine from 6wks and theyre perfect.
2.Any tinned puppy food with a little kibble/mixer will be fine. If your just feeding dry food, u may have to soak in a lil water. I gave mine minced beef, but be careful to drain some of the fat off if you cook it or u'll be cleaning up no.2's with a mop!
3.Yes itll eat on its own, try splitting it into at least 4 times a day. A little milk would be appreciated aswell id think,though not too cold or u'll end up as above!
4.Dont know wot the vets say in the states but over here a dogs shots are at 9 and 12wks, then u can walk them on the 13th week.
Other than that just give it a lot of love and as much attention as poss.
Hope thats helped a little bit. Dont be afraid to ask, theres so many helpful people on here.