3. Historic census
Stockport Local Heritage Library has copies of the census returns for Stockport for 1841 to 1901 on film and fiche.
We also have free access to Ancestry and Find My Past. They're websites that have digitised the census for England and Wales 1841 to 1911. Ancestry has also transcribed copies for Scotland 1841 to 1901.
We have various guides to using them for family history and indexes for the census on film and fiche.