Assuming you are using EndNote X2 or later:
the full text or pdf will not migrate over from the database with the citation
Once the citations are in your EndNote library:
highlight the new reference
choose Find Full Text under the References tab
EndNote will link to the U of T library server and find full text pdfs.
Keep in mind:
your EndNote preferences must be correctly set up. See Find Full Text box on the EndNote guide
EndNote cannot retrieve pdfs where there are multiple copies of articles through various providers. When this happens, link to the full text, save to a file, and finally embed it in the EndNote Citation.
See also the full EndNote guide