First of all congrats to your and your friends acquirement.
Hold it in honor
How about looking at the support pages and reading through the manual first?
Find support for your Canon EOS-1v. Browse the recommended drivers, downloads, and manuals to make sure your product contains the most up-to-date software.
www.usa.canon.com
Secondly, I would look at secondary literature, maybe like this - if you can get it (not my recommendation, just a quick search)
Discover and share books you love on Goodreads.
www.goodreads.com
And then you can ask experts about which film to use nowadays.
I'm out of Kodachrome vs. Fuji vs. Ilford b/w since about 25 years, when I developed my last Ilford film myself