.. What should I take from the apartment?

There are two things Lauren will need to have with her, and I'm not talking about cigarettes; she has plenty of those already.

On the coffee table, there's a Polaroid camera; grab that. (Good grief, an SX-70! Cutting edge for 1973, since it just came out in 1972.)

The other thing is on the arm of the sofa, and it's a handheld tape recorder that's variously identified as a Dictaphone and a dictation machine. Lauren has been using it as a dream journal, and if you want you can listen to her last ten dreams, all of which are prophetic of this and future events.

There's also a large jar next to the door that's full of loose change. You'll need that at some point, but you can't take it until you need it.