Doesn't a Thinkpad have a Synaptics touchpad? x11-drivers/xf86-input-synaptics
For some reason, unknown to me, it automagically started working. I never touched xorg.conf, in fact I don't think there is one. There is a /root/xorg.conf.new but I have not edited it.I imagine OP is talking about the pointing stick on the keyboard, not the trackpad. I played with FreeBSD briefly on my ThinkPad t430 and got far enough to get my trackpoint and touchpad working, but I don't remember what specific settings I set in my xorg.conf.
moused_enable="YES"
moused_flags="-A 2.0,2.0 -a 1.2 -V"