Hi
As per above for the gearbox, Redline 75w 90NS. The NS is important due to modern oils can attack the synchros.
I use just E5 petrol in my car without any additives, no problems so far. The mech pump works fine, but keep the return line with it. As above installing an electrical pump requires you to add crash sensor cut off to be safe. I install a filter before and after the mech pump again to be safe as I have had crud come from the tank/old hard lines when I first started using it after it had been stood for a long time.
Fuel lines, I used Cohline, make sure from reputable supplier, you need R9 certified, from memory 8mm on supply and 6mm on return and remember there are hoses attached to the tank as well as in the engine bay.
Peter