The Classic and the SE are two diffrent macs. You got an old SE with a superdrive... Happens to be my favorite case.
There are 68K sites on hotline. I belive there was a realy nice one a few years ago and it still exists.
Format the HD and Reinstall the software. You will need to get it on disks or even better is to find an external scsi cdrom.
Oh, and wake up and smell the old macs. Holding down the C key will not work. I forget how now, but it was something like cmd-opt-del to bypass the startup disk. Search online for these startup key combinations.
No you wont be able to download stuff on a pc unless you have the pc file exchange extension. I really forget when it came out. I think 7.5.
You can get a modem for it. If you have a mac at home with a serial port you can set up tcp ip encapluated in appletalke and get it on the internet via a local talk network. See the other se thread for more details and links.