One Cat would probably need about 5 Bags,20 Pounds of Dry,and maybe 6 Cases Of Wet,and a 40 Pound Bag of Litter every 2 Months.
And his shots,and check up,of course.
The Toys you can buy at a Dollar Store or The Salvation Army.
And you can wait until the Foods on sale ,and phone the Pet Food Companies for coupons to save money.
Good luck with your New Cat,and we hope that you find a Beloved Companion.