I have a canon ir 1018j black and white photocopier that does not pick a paper nor photocopy

If the problem is simply that the machine is not feeding paper, you should clean the paper pick up and feed rollers. Typically there will be one attached or above the paper tray(s) and a couple that transfer the paper through the machine to the print drum and fuser. Find them and clean them with clean cloth wet with a dilute solution of dish wash detergent with a few drops of methylated spirit or isopropanol mixed in. If paer then feeds but no print - you have more serious issues.