If you can't use more than one appliance at a time without blowing a fuse or losing power, then that's grounds for a good landlord scolding. It's not your fault your landlord hired a shitty contractor to wire the house. You pay rent and should be able to use the toaster and the coffee maker at the same time. You shouldn't have to unplug your refrigerator in order to use the blender.
You Can't Use The Coffee Maker and Toaster Simultaneously