Here is my feedback
1. The BTC address where the BTC is stored starts with a 3... and is 30 characters long in total
2. The public key: 04de... 130 characters long in total
3. The passphrase I used as a first password: @2... This is a personal password 18 characters long in total
4. The second password which was hidden under a hologram on a physical Bitcoin coin: ELG... 30 characters long in total
Private keys were not given to me.
Let's see.
1. That refers to P2SH address.
2. Both "04" prefix and 130 total character indicate it's uncompressed public key. But since we talk about multi-sig address, there should be more than 1 public key.
3 and 4. I agree with LoyceV reply.
The hard part is finding software which can generate P2SH multi-sig address from uncompressed public key. You probably have to follow @nc50lc reply.