Google a site called buyforbaby, it sells second hand mcn's. Avoid ebay! I can't wait to try out my mcn's on my little girl . Watch out for the cloth nappy girls, they will have you addicted in no time.
If you buy new, many sites have trial packs with three nappies and boosters / liners etc.
EDIT: how do you feel about fitteds + covers, vs AIO?
if you google "baby beehinds" or "bum genius" or prob any of the main brand names, on their main pages (the nappy name dot com), they often have a 'New to Cloth' section where they explain with pictures the different types and how many you will need.
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