These pre-date civil registration in Ontario which began in 1869, so you won't find birth, marriage or death records for them.
1851 Census (actually taken in early 1852, ages given are as of next birthday) finds them in Wellesley Township, Waterloo County -- they don't move to Perth until later. There is also a Martha Kincade living next door, aged 23, likely married to James Kincade, aged 21 -- probably a brother to Mary.
The whole family is Church of England -- the Anglican archives may be able to find older church records for you.
1861 Census has the family noted as Camble in Wallace, Perth County -- James, aged 38; Mary, aged 31; John, aged 11, Gophes(? - Joseph), aged 9; James, aged 7; Elxandre, aged 5, and Elizabeth, aged 2. At this time, they profess faith as Wesleyan Methodists.
Robert & Elizabeth Kinkead (sic) are also in Wallace Township in 1861; aged 64 and 51 respectively. No other children are listed with them.
By 1871, Robert is deceased and Elizabeth is in Howick Township, Huron County, with John Campbell, aged 20; Joseph Campbell, aged 18; James Campbell, aged 14; and Elizabeth, aged 16.
Elizabeth Kincade died in Howick Township on 26 May 1877, aged 72 years; born Ireland; informant was the doctor of Fordwich, Huron Co.