This will all depend on your Landlord and the type of property. Some will be completely empty, no carpets, curtains, cooker etc. Some might just be carpets and ‘white goods’ provided (that’s your fridge, cooker and washing machine) Others, such a shared housing, may have fully furnished communal areas so kitchen and living area furniture, and you’d just need things for your own bedroom.
This would be one of the first things you’d need to check when getting in touch with a Landlord to ask about a property (if it doesn’t say in the advert)
Use this checklist to what furniture is included or that you’re going to need. Remember to build this into your budget! Shelter Cymru’s Leaving home checklist