Do you have the network card? If so you must find a translator for base2 (Coaxial Ethernet) to base10 (twisted pair Ethernet). Normally an ancient network hub do this, but you must know the address of your router and then use a fixed IP for the Mac.
From there you can install Samba on the pc to make it share a directory of your choice to transfer things to and from the Mac using FTP, Netscape navigator or the archive manager of the Mac.
BTW: it's about time to upgrade the memory using a couple of 4Mb 30Mb SIMM. The VRAM SIMM can be upgraded to 512kb instead of the ridiculous 256kb it probably have built-in.
But beware that I'm on a search for one unit since last year and found only in USA, but there the postage to Brazil is an absurd US50.00 (
postage alone!).
Another possibility is grabbing the HD, hooking in the pc via a PCI SCSI controller and firing up Basilisk with the same settings of your LC (might be good to emulate the LC II to speed up transfers). Remember to share a directory of the pc for the transfers. Pretty much the same thing we do with WinUAE.