Lolol I need help with all 3

Me it would be greatly appreciated : )

Your new boss just entered your office, he says "bonjour monsieur, comment allez-vous? ". how would you answer his question? by saying “ça va. et toi? ” by shake his hand and saying ”salut. et vous? ” by saying “bonjour. et toi? ” and shaking his hand. by shaking his hand and saying ”bonjour. bien et vous? ”

Do we say "jouer aux jeux videos" or "jouer a des jeux video"