does my car have a hydraulic clutch?how do I know if its leak or need new clutch

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my car all of a sudden was hard to get into 1st gear and reverse , seemed stuck like couldnt shift from parked position, then started grinding when trying to go into reverse. I then went to drive home after issue started but before i could get there i lost pressure on clutch and was unable to get out of 5th gear.bucked and stalled. how can i check to see if its a slave cylinder leak or if i need to replace whole clutch and is it a hydraulic system? About a year ago i lost pressure on clutch all of a sudden which turned out to be a leak which was repaired. I also have a coolant leak and had the catalytic converter code come up.