If you check the Cambs FHS website at
http://www.cfhs.org.uk/Search.html you'll find his baptism which includes his mother's christian name, and there are also census indexes. Just put in col and toft. By way of warning, in 1851 Young has been mistranscribed as Henry, age 14 - all were born in Toft except Elizabeth the mother who was born in Hardwick, Cambs.
His baptism, not birth, is also on the IGI, extracted so reliable, also naming his mother. The marriage of Henry and Elizabeth is on the IGI at Hardwick.
David