Jones - Haywards of Sydney, Australia

I am researching the Jones-Haywards surnames from Sydney. I don't know alot about the line in Australia, but can carry the family forward in San Francisco, CA

My line starts with:
John J. Jones
b. ca. 1815, possibly Wales
d. bet 1870-1880, San Francisco, SF Co., CA
m. ca 1840, Australia
Jane or Mary Jane Haywards
b. ca. 1815, possibly England
d. ca. 1885, San Francisco, SF Co., CA
...1. John Charles Jones
........b. ca 1843, Sydney, NSW, Australia
........d. 25 Feb 1905, San Francisco, SF Co., CA
...m. Margaret Coffin
........b.11 Jun 1846, NY
........d. 4 May 1908, San Francisco, SF Co., CA
........1. Jeanette "Nettie" Jones
........2. Nellie Jones
........3. Maude Ethel Jones
...2. Thomas Augustine Jones
........b. 3 Jan 1850, Sydney, NSW, Australia
........chr. 1851, Wesleyan Methodist, Sydney, NSW, Australia (this info. from the Australian Vital Records Index CD)
........d. 14 Mar 1923, San Francisco, SF Co., CA
...m. Margaret Kelly
........b. ca 1849, Manchester, Hillsborough Co., NH
........d. 13 Jul 1889, San Francisco, SF Co., CA
........1. Josephine Jones
........2. John Jones
........3. Clara Jones
........4. Matilda Jones
........5. Margaret Mary Jones
........6. Gertrude Jones
........7. Alice Jones
........8. Francis Jones
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From what I have John and Jane came to California ca 1860. I did find the christening record for Thomas on the Australian Vital Records Index, Family History Resource Files CD. I don't know how to go about getting the original record, or if it is worth it? Would it have any more details about John and Jane's parentage?

I have more information on the descendants of this line. If anyone is researching these families, I would love to hear from you. If anyone has any clues as to how to research the family in Australia, I'd be very appreciative.

Thanks!
Mel