Well depending how far back I went I always thought that hygiene products would come in handy! Tha computer would be useless probably! Maybe a refrigerator & freezer would be best.
A refridgerator and freezer wouldn't be that helpful without electricity.
I agree, depending on how far back I was going, and what limitations I may have, I'd take a modern bathroom. I also agree on the personal hygeine products. Also maybe some modern bras to distribute.