Some popular options are MangaPark and Crunchyroll. Both offer a decent collection of English-translated manga. However, availability might vary depending on licensing and region.
Some are free. As I mentioned before, Project Gutenberg offers a large number of free online English novels, mainly classic works whose copyright has expired. However, many newly - published novels on platforms like Amazon Kindle Store are usually not free and require payment.
It depends. If you're reading manga on legitimate websites that have the rights to distribute it, it's not illegal. However, if you're getting it from illegal torrent sites or unlicensed platforms, then yes, it's against the law.
The legality of reading manga online depends on the source. Legitimate platforms with proper authorization make it legal. But most random sites offering free manga are likely illegal and can get you in trouble.
You could look for manga on platforms like KissManga. However, keep in mind that not all the content there might be properly licensed. It's always best to support the creators by using legal and paid services when possible.