Well the first set of jabs are about £50.
Neutering was £45 with a microchip inplanted in case he went AWOL.
Worming is around £4-5 every 3 months or more often if they eat a lot of mice (apparently mice carry worms).
Frontline is around £5 a month depending on where you buy it, you can get it cheaper over the internet.
Actual medical treatment (so far)
Falling off roof, no injuries but a check up £30.
Blocked anal glands, consulting fee and antibiotics £40ish.
Infection from bite wound £35.
Cattery fees £7.50 a night, but it's FAB approved and he doesnt mind going there too much, we saw cheaper but they were full of miserable moggies, the cats in the approved one looked so relaxed.
Cat carrier for trip to vets, £12-20ish depending on where you buy, last time I looked Wilkinsons were really cheap and the box looked ok to me.
Covered litter tray £15 in argos so it doesnt smell. We use smart price litter from asda.
Ping pong balls from sports shops make excellent kitten toys, as does white string.
You must make sure however that you dont have lillies in your house and garden, they are very toxic to cats and cause acute kidney failure so DH knows to avoid lillies if he gets me flowers.
Dont get conned into kitten milk, they can drink water just fine, they dont actually need milk in their diets and some are badly intolerant to it anyway and get a runny tummy.
I cant think of anything else.