hokuriku arch pass

hi Daniel.

i will be touching down in Narita Airport on the 14th april 2pm. i will then activate my pass to go Osaka.

with this pass, it covers the route to Osaka, Nara,Kyoto and back to Tokyo.

My question is, i wont be able to use the pass within Tokyo, Nara and Kyoto. so do you suggest day passes to travel within these cities? I am getting the metro pass in Tokyo since i will be there for 8 days. I will only spending one day in Nara and Kyoto, so im not sure if its worth it to get the day pass.

Am i supposed to book seats to get on the shinkansen in Narita airport itself?