u can use sysctl and dmesg to list all your hardware on freebsd

example
# sysctl -a

then use grep and egrep to choose what hardware you like to display

1. CPU

# sysctl -a | egrep -i 'hw.machine|hw.model|hw.ncpu'

2. Memory
# sysctl -a | grep mem
or for good display u can see this page
http://www.cyberciti.biz/faq/freebsd-command-to-get-ram-information/

3. Harddisk

# egrep 'ad[0-9]|cd[0-9]' /var/run/dmesg.boot

4. Ethernet
# ifconfig