Will toy guns work if you just want to scare people for self defence purposes ? [I Hate Guns]

It’ll most likely end badly for you. You never want to use a toy gun to “scare” anyone as it’s often resulted in an unknown third party calling law enforcement and or even drawing a real weapon and using it in a manner that would result in harming or killing you. Brandishing a realistic looking weapon is not a good idea for any reason. You need to reevaluate your situation and use logic instead of making a decision that could likely get you killed.
If you hate guns then don’t even pick up a replica/toy gun etc. Leave that responsibility to people who have been trained to handle firearms.