Went to drive my FJ40 around tonight so I let the engine warm up and went to take off but when I let the clutch out it wouldn't move right away. It started to jerk and then it sounded like the engine was going to cut off. I've had no issue with the clutch before this. I searched the forum for advice on what it could be and many said to check the master cylinder fluid level. The fluid level was about 3/4 of the way full per the pic of my reservoir below. Should I top it off? Any other ideas on what it could be?