How do I get a free Tradeview Pro account?

You can get the TradingView Premium version for free if you sign up for a broker or a site that partnered with TradingView . For example, you can get TradingView pro features for free if you sign up in Fyers broker. The Fyers trading panel is almost the copy-paste of the TradingView with all the premium features.

I forgot my username/password and would like to restore access to TradingView

TradingView comes with many free features, and they can be used without any registration . A subscription to the paid version makes sense once you feel the need for more functionalities like multiple charts, layouts, and custom time intervals.