First, I am presuming that you mean Toledo, Ohio.
The most likely source for the information you seek is the Archivist of the Diocese of Toledo. Have a look at the diocese web-site - www.toledodioces.org
There is a toolbar on the home page with a button "Offices & Ministries". This gives a page of options. Under Chancery, the first one is "Archives". Click on this.
It is worth reading this page, as it explains much about the policy of the Diocese of Toledo towards family history requests.
Also on the original Toolbar is a button - "Contacts" There ia a prespared email blank that you could use to put your query to the Archivist, and ask his advice about possible schools and where the records might be. There is also a general postal address, and you would need to address your note to the Archivist.
Hope this helps
Jim Lancaster (Bury, Lancs.)