1999 camry 4 cyl

great car so far over120,000 miles, yester it started but when put in gear it wouldnt catch, move at all, later on it did. this morning it didnt move again when put in gear. this afternoon, it took a bit to get the engine going and is making like a diesel engine noise, which never did in the past

If it’s an automatic transmission, have you checked the transmission fluid level and condition?

Tester