2: whenever i open ANY map it crashes (also whats the wc mappack)
3: idk how to install leaknet
Here are the problems. I can clearly see you're very new to this community so let me explain both things.
WC-Mappack: It is a mappack that contains map source files for hammer [.vmf] that came included with the original leaked beta. It contains a multitude of maps ranging from the Late 2000 to around mid 2003. It contains aprox. 1/3 of all the maps developed for the game [Or so I heard]. They range from story related maps to engine tests. Most of them have been fixed at this point and are fully playable [or at least as much playable as they can be].
Installing Leaknet: It's quite easy when you get the hang of it. Just download the newest build from
leaknet.org and extract the files to the anon-hl2 directory.
Or here is something better:
The Mega Build. Comes with Leaknet pre-installed and a couple of mappacks [For exaple: The 2001 Mappack]. Requires a program like Daemon Tools to run the installer.
Also, follow the guide again. Maybe you missed something [Like I did back in the day]
Take care. Cheers!