bitcoind – Bitcoin first versions

please excuse my ignorance,

I think i purchased some bitcoin quite some time ago within the early adoption phase, back then I think passphrases were non existent, Is there a way to access the old bitcoin or bitcoin d software/platform, or what should i do? would that login if i can find it still work or will it automatically say enter passphrase? i am downloading the most recent full node to support although I am a at a bit of a loss at the sheer amount of information and need some expert advice please :]