Filmshooting

I've found b&w processes inch for around £40, I just wanted to film some stuff and was low on funds so thought I would give these a go

Yep I know I found development for £40 a roll. I really wanted some film and was low on cash this month so thought I would give it a go

Hi I've just got a yashica super 60 e with 5 boxes of kodachrome 40 which expired in 1980, just wanted to know any techniques or tips on how to shoot with it? I have no clue as to how it was previously stored at this moment in time.
Many thanks Paul