vaccination prices range form a little to a lot., but you can take him as soon as you like now.
when we had our puppy his first round it was £45 all in, a friend went to a different vet, hers was £60, but that vet also microchipped her pup for that price. so it's tit for tat.
a cat neuter is roughly around £60, a spey is usually more costly as it's a much more involved operation.
Cats protection often run schemes for cut price neutering (as little as £5 in some areas) and you can also get financial assistance from the RSPCA towards neutering.
information can be found online for these, but neutering won't really be a concern until he is around 5-6 months old and everything has dropped..
it's not often that help with the cost of vaccinations can be found, either.
The RSPCA homes often run a cut price clinic for those on low incomes, they ask for a £15 donation towards their costs. but surgeries and vaccinations aren't usually provided under the scheme.
flea and worm treatments can be bought online cheaper than at the vets and products which are more effective than the ones you buy in supermarkets.
however you need to do your research for these first, it's as simple as knowing your cats weight in most cases.
for the first year at least, until your pet can be considered "adult" i would get these from your vet, afterwards, have a look around.