Hello everyone I just have a quick question if any of you know. If I buy the PC game copy at the store will it work with the online season pass also? Its a pretty easy question but I haven't found any info on it please help?

Both the game and season pass require Steam, so either way their keys will be activated on Steam so it doesn't matter if the game was physical or digital, it will work with the season pass. Seriously, what makes people think Bethesda would make them incompatible?

For the PC you have to set up a Steam account and register your game there.

It does not matter where you buy the Season Pass - it comes with a code you also register with Steam.

All of the Season Pass DLCs will download from Steam.

Yeah it doesn't matter as both the PC Disc and Season Pass will require a steam account.