For you less try;
sudo apt-get install nodejs
sudo apt-get install npm
sudo npm install -g less
sudo npm install -g less-plugin-clean-css
sudo ln -s /usr/local/bin/lessc /usr/bin/lessc
sudo ln -s /usr/bin/nodejs /usr/bin/node
However it might be a good idea to follow this example to the letter and you should be fine. I recommend a complete remove of what you have installed then reinstall. Link for instructions see bottom
Remove all
sudo apt-get --purge remove odoo
#not ideal but.. works.
sudo find / -iname 'odoo' -print -exec rm -r {} \;
# removal of PostgreSQL
sudo apt-get --purge remove postgresql\*
sudo rm -r /etc/postgresql
sudo rm -r /etc/postgresql-common*
sudo rm -r /var/lib/postgresql
sudo rm -rf /etc/apt/sources.list.d/postgresql.list
sudo userdel -r postgres
sudo groupdel postgres
sudo find / -iname 'postgresql' -print -exec rm -r {} \;
# if you see dependency problem it is most likely you have a problem that while install PostgreSQL you did this multiple times
# and therefor left some of those packages, you will need to remove them 1 by 1 before installing again!
# I suggest the following for installing PostgreSQL
sudo apt-get install python-software-properties -y
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main" >> /etc/apt/sources.list.d/postgresql.list'
sudo apt-get update && sudo apt-get install postgresql-9.3 pgadmin3 -y
Link for instructions installing v9 on trusty:
https://www.getopenerp.com/install-odoo-9-on-ubuntu/
I know that on ubuntu wily 15.10 ( you can use the deb file, and it will install without a problem) but some features might not work in version Odoo v9. For me I made a small bash shell script to install Odoo v8 on 15.10, do not think it will work for you on 14.x