Ok i'll help try and help
1st service £ 115 at 15 k ( ish)
2nd £ 239 at 30 k ish
3 rd £ 269 at 45 k ish
brake fluid at 20 k IS £ 50
MOT AT 3 YEARS £ 50
SO THATS £ 723 POUNDS AS A MINIMUM.
Tyres are a hard one but if you drive hard or alot 45 k miles, its possible you might need 4 front and 2 rear. but to be fair lets say you only need 4 replacment tyres so that £ 400 quid.
So far we are at, £ 1123 as a minimum.
So you have to think if the other £ 600 quid, for any additional is worth it, breakdown cover, wipers, and everything else i cant think off right now.
Normally people save money by taking these agreements, it might not be a fortune but you will save money.