Yep both of those are true. Musk did say he bought Twitter to be an arena for free speech, and that the Twitter account was suspended.

Archive.org links for both the links if you can't read the full articles: https://web.archive.org/web/20220414204110/https://www.washingtonpost.com/technology/2022/04/14/elon-musk-ted-talk/, and https://web.archive.org/web/20260829202851/https://www.washingtonexaminer.com/news/4634208/trump-portfolio-tracker-account-suspended/.