Also I have looked under car and there seems to be some fluid on underside of subframe .

 

Clutch slave cylinder seals have gone or a pipe to it has ruptured so the clutch is not clearing properly when you depress the pedal?

 

Thanks for the reply I have stripped out air box and battery box and slave cylinder is all dry and not leaking , can this fail and not leak fluid . I have also checked the feed and not leaking . When pressing clutch up and down the slave cylinder does make a sqeeking noise And a tapping nosie when full down . Also when you press clutch down and try to engage 1st it rolls forwards .

 

Clutch sounds like its working then, but if you have oil dripping from underneath you say? it could be then a gearbox or engine flywheel oil seal thats leaking and caused oil to get into the clutch which would cause it to drag and not release properly which will give the crunching gears selection??
You need to find out where the oil is coming out, if the flywheel/clutch bell housing? if so thats probably the cause?