Newbie has a few questions

Hello. Since yesterday I am proud owner of a Volvo V40 (1998, 1,8l, automatic). I have a few questions to the experts : – I am in possession of two normal keys. Can I retrofit a remote radio control? Or did the Volvo normally have a radio ZV on board as standard? – What have the buttons S and W on itself? – My tailgate is not locked when closing. I had the cover down and took a photo of the mechanics. It looks to me as if something has broken down. Besides, it is strange that I can not unlock the lock with the key. It can’t be turned. I once hung two pictures as an attachment. – When I hit full left and right I hear so knarz noises from the front axle? Your tip? I suspect the drive shafts. That was for the first time. I drove 60km with the Volvo so far. I moved the last 18 months a Hyundai XG30 V6. There are already + worlds between. However, I don’t believe the Volvo and its consumptions help.