Joanna
The 1841 census will give ages, although the enumerator will round down or up to the nearest 5 depending on guessamate of occupants age by the enumerator......that is only if the occupants dont know how old they are!
The address would probably be Clifton Hampden (no street/road names) and where born would be.....In County by the form of a Y....or out of County in the form of a N....if they was born in Scotland or Ireland, it would possibly be in the form of S or I.
And i'm sorry to say that I don't have the 1841 Oxfordshire census.
Clifton Hampden doesn't sound that big a place? because you are relying on someone doing a manual trawl!
Try a new post for the 1841 census and another one in the Oxfordshire section for the burials index/Parish records for the names of Talbot & Fruin around the area of Clifton Hampden, Oxfordshire...and keep your fingers crossed
Regards
Bryant