I got a response from UJ earlier today (in case anyone is interested):

Hello, Thank you for your inquiry.
There is no application fee. Admission fee is to be paid upon admission. Please enclose suplemental materials such as LoRs you have in the application package you will mail. Passport photograph is sufficient.

Regards,

School Office

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Jagiellonian University Medical College
Faculty of Medicine
School of Medicine in English
Tel. (48 12) 422-80-42
Fax: (48 12) 421-28-69
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Address:
12 Sw. Anny Street, room no 4
31-008 Kraków
Poland