Just going off the top of my head, a typical bar stock would be something like:
Bottled RTD: Becks, Budweiser, Sol/San Miguel, Peroni, Desperados, Bulmers/Old Mout, Smirnoff Ice, WKD Blue
Aperitifs: Pimms, Pernod, Martini Bianco/Rosso/Extra Dry
Brandy/Cognac: Courvoisier, Remy Martin
Pre-mix cocktails: Margarita, Pina Colada, Mojito
Rum: Bacardi, Captain Morgan, Morgan Spiced
Vodkas: Smirnoff Red, Grey Goose, Absolut Blue
Whiskies: Bells, Famous Grouse, Jack Daniels, Glenfiddich, Jameson, Southern Comfort, Talisker
Gin: Gordons, Bombay Sapphire
Liqours: Amaretto, Archers, Baileys, Cointreau, Drambuie, Jagermeister, Kahlua, Jose Cuervo Especial, Sambuca, Sambuca Nero, Malibu, Tia Maria, Licor 43, Creme de Cacao, Creme de Menthe
Shots: Aftershock, Apple Sourz, Blackberry sourz,
Plus your red bull, coke, diet coke, lemonade, tonic, soda etc for mixers, and a selection of wines, sparkling wines and champagnes, and fortified wines.
Then you need your glasses:
*Pint standard
*1/2 pint standard
*10oz highball
*9oz rocks
*Sherry glass
*Balloon glass
*175ml wine
*250ml wine
*Flutes
*Shooters
*Martini glass