Pre entry offer tasks

Ive received the date and everything for my offer of service teams call, and they gave me some things to do.

most of them need to be signed with a witness at Halton, do i fill in the rest of it and then send it off to my recruiter without signing it or just print it out and take it with me with nothing filled in.

there's also a driving licence link, it only tells me my driving licence details and offers me a code to share to someone, what am i needing to do with this bit???