I have a 09 Scion tc (manual) and currently having clutch problems. The car won't go into gear when car is on but moves freely when car is off. I saw one of your videos and that said it could be the clutch master cylinder. I've replaced the slave cylinder and master but no luck. Could it be the clutch needs replacing and if so how can I check. Thanks.

if the clutch is hard when you push it down, then you need a new clutch assembly inside the transmission, period. Not a cheap job to do. If clutch pedal is soft, it still has air in the lines