That's a lovely collection. I don't have any connection to them, but here are a few thoughts anyway.
David and Harriett Hazelgrove both died in the East Preston registration district, so clearly they were in Sussex.
Besides the photo of the car you've posted, there's one of a different car next to the same house, but from another angle. This car has the registration CL-382, which was issued in Norwich some time after 1904 - the use of the hyphen might help to pin it down better. It might also be possible to identify the make and date of both cars.
Also in that picture is a road name - Gordon Road. I haven't managed to locate it, but I'm fairly confident it should be possible.
Some of the photos clearly aren't Sussex - Cornwall, perhaps? The Alps or Norway for some?
If you'd like some help with these, try posting them on the Handwriting Deciphering & Recognition board.