Aslamaolaikum Saya
As far ask I know arranged marriages are not against the Quran if it is meant that one party introduces two prospective partners. However, if arrange marriage means forcing an individual by emotional blackmail or physical abuse or threats, then this would be against the Quran's freedom of an individual to make a complete choice about whether they want to marry someone or not. Also any form of 'forcing' is against the Quran.
Again with dating, it depends how you define 'dating'. The western concept of 'dating' would I think be clearly against the Quran. Saba