For anyone that purchased a MCUFRIEND 3.5"TFT, that actually states 3.6" on the unit.
Can't find what the screen controller is?
Can't find a pin-out?
Well, try this site. You will need Google Chrome or your preferred browser with a translator as the site is Russian;
So far, for me posts 274, 327 & 328 have given me a wealth of info.
Give it a go.