There are quite a few pictures of Wrigley trucks in the gallery section if you want to know what it should look like. It appears to have a Villiers engine which should be easy to buy spares for and is easy to repair- why not start a new topic in the “Projects” section to tell us how the rebuild is going and then we can help if you get stuck with anything?
Good luck with the recovery it looks like it will take a bit of digging out!