This is way too vague. Exactly which files do I need, and what procedure do I take for getting them to work?
I'm sorry, but if you can't figure it out from the linked documentation and disk images... you're probably not going to be able to do much with the language.
The above mentioned link on apple2.info clearly shows the APPLE1 and APPLE2 disk images you need, get the version 1.2 ones. In the emulator, load the APPLE1 image,
http://apple2info.net/images/5/5d/Apple2Pascal_1.2-APPLE1.dsk into slot 6, d1, load the APPLE2 image,
http://apple2info.net/images/5/5d/Apple2Pascal_1.2-APPLE2.dsk into slot 6, d2.
Apart from that, Read The Fine Manuals, as I linked earlier. We're not going to be able to take you step by step through creating a workfile and compiling it, it's covered in the manuals. Read this one specifically:
http://apple2info.net/images/2/29/Apple_Pascal_Hands_On_Approach.pdf Apple Pascal: A Hands On Approach, it was frequently used in high schools to teach using Apple (UCSD) Pascal. It covers booting up, using the editor, compiling a program, etc.
By the way, the disk names (APPLE1, APPLE2) don't refer to the computer they're being used on, they're the actual volume names of the Apple Pascal language disks. The colon after the names is how Apple Pascal shows volume names....