Long Post, Lots of different bits and pieces
From the OP
Hoping someone might have some inspiration on this one...!!
I have an Esther Taylor- born circa 1859 in Mille near Narrabri NSW
She married George Creighton in Coonamble in 1875- no ages recorded on marriage, but if her age on her children's birth is correct, she was a minor (16yrs old).
Esther and George had 5 children- all born in Coonamble- George Hector, Charles Richard, Edith, Emily Jane and Sarah.From reply #29
Esther and George were married in an Anglican Church in CoomaAnd from reply #32
Ah Esther and George married in Coonabarabran in 1875 not Coonamble
So, thanks Neil you are spot on correct, for the NSW BDM online Index gives the marriage as registered in the Coonabarabran District and ref #2332 (1875).
Note to JM, check the Indexes !
Some more thoughts ...
:)As the marriage was not at Coonamble,

.... I am

Sorry Kylie that I forgot the first rule in family history ... Check all the information given ! I should have thought your reply #4 through
contacted the local parish in Coonamble in the past without success (they could not find the originals) . Of course they could not find the originals, these should be at Coonabarabran, I should have checked !!!
BUT, here's some good news : 
NSW ER
1870 THE BOGAN
George CREIGHTON, residence, Castlereagh River, Coonamble.
John TAYLOR, residence, Dahomy, Castlereagh River.
George Alfred TAILBY, leaseholder, Gelargumbone, Castlereagh River (I presume this to be today’s Gulargambone NSW 2828)
GREVILLES 1875 Directory
John TAYLOR, farmer, Woodland, Coonabarabran
Mark TAYLOR, farmer, Mistletoe, Coonabarabran
Mary TAYLOR, settler, Mistletoe, Coonabarabran
Samuel MATTHEWS, labourer, Namoi St, COONAMBLE
George TAILBY, grazier, Golaragambone, COONAMBLE (Gulargambone

)
From George Hector CREIGHTON’s 1888 papers
“Wandering ab out the streets of Coonamble not having any lawful visible means of support his father & mother being in gaol” “born 8th Aug 1877, Coonamble CE” “Information as to name and birth obtained from the district Registrar Information as to religion obtained from boy’s mother” ... and the mother is doing a sentence of 2 months for Larceny from a dwelling” (There are other comments given by the police with claims of Esther associating with men who were not her husband).

A Question please, Kylie ....
I wonder if Esther could read/write ... Kylie, did Esther sign or make her mark when she married George, please “They (JM notes this is Esther and George) have five children in all, three of whom were sent to the Industrial schools on the 29th May last. One is an infant in arms. " (Again this is from George Hector CREIGHTON's May 1888 papers admitting him to the Vernon Training Ship in Sydney Harbour.)
JM notes, this infant would be Sarah, and as she was an infant in arms, she was thus NOT admitted to the Industrial Schools ... so most likely she was with her mother at that time, in the Coonamble Gaol, as there are three names (but NOT Sarah's) at the admissions for the Benevolent Society reply # 8 & 10
Conditions at Coonamble gaol (not good,

)
http://trove.nla.gov.au/ndp/del/article/13432489 SMH 9 April 1879
http://trove.nla.gov.au/ndp/del/article/13524443 SMH 17 Nov 1882

Sadly, I have not found any trace of the BARUFFI family nor of Esther Creighton, in my NSW off line resources. Sorry.
BUT My fingers are crossed that the
Coonabarabran C of E will have the originals of the 1875 marriage cert, and from that we will learn the names of Esther’s parents and her age at marriage, and her father’s occupation, and the same for Esther’s husband, George.
http://www.ourchurchlink.com/profile/view.action?id=5095 There's snail mail, phone and email details at that link
Cheers, JM