Ok keep in mind that sculpture and art descriptions often take great poetic license with the meaning of the word they use. In other words they don’t intend to mean precisely, or literally, what the words themselves mean. This one isn’t as bad as some.
1) yes basically. In this use it means not as bold or as intense as the other.
2) not exactly. Funereal is an unusual adjective that means having a tone or character appropriate for a funeral. So basically somber, mournful, etc. so the fireplace is meant to bring feelings and thoughts related to that.
3) I’m not as sure what the description is getting at there. It could mean literally when pressed the surface doesn’t have any give or softness.