Its all relative, depends where you are from and your upbringing.
1 and 5 are blasphemous rather than anything else (i think)
2 is a straight substitute for a much more offencive phrase, so by intent then yes tis swearing.
3 yes(although we 'pit yakkers' use this word to mean devil as in little devil for a mischievous child or something that is broken or more specifically worn out it is broken is often announced -it's buggered/I'm buggered, that buggered it up etc.
4 yes in Peterlee, Co.Durham No in Hartlepool, 9 miles away. (Taught in schools in both towns, one where staff and children use quite freely and the other where the child may well have been burned at the stake after the headteachers door closed behind him, such was the reaction.
This is also true of tw*t, bum, belly button?? (yes I know??) ***** and ar*e.
Bet that was no help at all. I agree with other answerer's wouldn't want my kids saying them in public!
Taught in many schools around the uk