I've had this XC70 for a few months and I'm finding it VERY frustrating that when I exit the car, all the doors do not unlock automatically. So I'm constantly walking around to open a door to get groceries or whatever out and it's locked! There must be a way to set it so when you put it in park and open the door all the doors are unlocked. I only have one key and no remote. The 2nd question is - a second key will really cost me $250 or more? Any way to do this cheaper? Thanks.

The car should have a central lock button on the front door handles. That will unlock all the doors. A remote will unlock all the doors if pushed twice. Your key will unlock all doors by turning it twice in the front door lock. The following link is for your owner's manual. That should give a more detailed explanation.

https://volvo.custhelp.com/app/manuals/OwnersManual/om_id/689