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Cat servant for over 50 years.
Cardboard boxes for play & one with a blanket for sleeping in.( cat beds ignored).
Large litter tray with a hood & whichever litter they are used to ( cats are fussy about the "feel" on their feet). We have dry food always available (Sahara likes iams/james wellbeloved & purina). Mon petite pouches. Water in a huge bowl & food on plates as she hates things touching her whiskers. No plastic as risk of acne on cats chins.
We have had cats that used scratching posts & others that opted for carpet. Most used was a 4ft solid post DH made & covered with carpet( cat could stretch full height & never topple it).
Favourite toys are old make-up brushes/rolled up baby socks & anything feathered (sadly includes real birds)..
Microchip & a very solid cat carrier are essentials ( many cats escape on route to the vet) we have a fully metal carrier which is 30+ years & going strong. Cats cannot be vegan/vegetarian due to inability to make taurine without it they develop fatal heart problem but can have veg as a treat if they like, most prefer cheese. You need to check your garden for killer plants ie lillies .
Your cat will soon have you all trained to answer their every whim. Enjoy your new housemates.