Bike Build Advice & Parts Needed

Hey All,
I am wanting to embark on a couple of new projects and need both advise and parts, so hoping this is the right place.

1. I have an old langster frame and am not sure of these parts, the correct forks, BB or headset.
   
2. I have been given an old Peugeot bike (carbolite103, I think) this could be a fun re-build, but not even sure where to start.
   
   

Thanks in advance.