First thing to check is whether there is a barrell battery and if it is leaking.
http://www.commodore-amiga-retro.com/amiga/amiga_scuzz109.htmNetworking isn't that much a problem really if you just want to play games.
Check card for any details. And post again with what you see. Don't mess around too much though if things are working. Take photographs of the whole set up before you do anything.
What does it say on the screen regarding workbench kickstart and memory. And is it twin or single floppy ? Do they work OK ?
Has it got cork feet ?
And has it got a hard drive ?