I only want to know 2 things, the repositories with the raw domains, some are listed like:
google.com
or
0.0.0.0 google.com
i checked that pihole only reads that ones that have 0.0.0.0, i want to know if it's the only one available format, and if someone know a page with the largest list of repositories and different bunch of categories to block with the "0.0.0.0 google.com" format.
Pi-hole just uses the domains from these lists. If the list is just domains then that's easy. For lists in hosts format (with the leading 0.0.0.0 or 127.0.0.1) Pi-hole extracts just the domains. Pi-hole can also read lists in Adblock Plus format now – see this announcement for info.
The Firebog is a good source of lists. The green lists do a great job of blocking stuff with very few false positives in most cases.
That is incorrect. Pi-hole will read and process either. If there are leading IP's (as in a hosts file) Pi-hole strips them and retains only the domains.