The top picture is almost certainly Cock Robin bridge, a location I featured in some photos earlier this year. It's quite a co-incidence that this old photo should turn up.
Cock Robin Bridge steps Pendleton Salford (bw)
Holland Street....
I can't identify where the other photos were taken.
I wish we had the identity of the photographers who took these old photographs and where these photographs originated from - maybe the Salford Local History Library.
As they are not hosted by me on this server, I am assuming it is okay to display them on this Forum, but photos should always be credited and copyright guidelines followed. That's why I always put my name and copyright details on every photograph.