Newbie problems :)

Hi ppl, you purchased my first renault :) very happy with how the laguna drives etc, lovely car. Just a few problems i've got, it's 05 laguna initiale 2.0 petrol. First off all the handbrake does not work, no idea were to start as it's electric haha. Also the front windows dont work but the rears do. Any help or advice would be much appriciated, many thanks