Pidgin from one computer to another?

Yes, and account configurations. Just copy the purple hidden directory in your home.

~/.purple

You can learn about .purple location and other frequent asqued questions in pidgin FAQ.

https://developer.pidgin.im/wiki/Using%20Pidgin#Whereismy.purpledirectory

 

Old machine Windows XP. New machine: Windows 7

C:\Documents and Settings\<username>\Application Data\.purple\

The entire directory can be brought over, or if you just want specific pieces look at the individual files, they’re pretty self explanatory (accounts.xml, prefs.xml, etc). Put them on the Windows 7 machine in

C:\Users\<username>\AppData\Roaming\.purple


You can set a PURPLEHOME environment variable to tell Pidgin where it should store (or look for) its .purple folder. I’m not sure if it’s created by default, but it certainly helps in managing the directory afterward. Basically you just need to copy that .purple folder over, which will probably be in %appdata%.

More info here: http://www.lib.unc.edu/reference/eref/pidgin/env_var.html