Hi i have a 2004 toyota hiace changed the complete clutch kit but whether in gear or not when i press the clutch pedal in its quiet br when i release it theres a grinding sound

SOURCE: tdi clutch pedal pushed all the way down but hard to shift gears

Check your clutch fluid level, sometimes a seperate reservoir (drivers side on firewall), some clutch systems take fluid from the brake system (check brake fluid). If thats ok then the clutch slave may be failing.
If the clutch fluid is low refill it and check for leaks (or just wait till the symptom comes back). If it's happens often then theres a leak in the line or the slave somewhere.

SOURCE: clutch pedal sticks

it is the slave cylinder, just fixed that problem

SOURCE: Where can I check the clutch fluid on a Toyota hiace 1997?

you can find the bake fluid pot ether under the dashbord or under the engine cover its got a silver top on it ok
this should anser youre qestion

SOURCE: Toyota Hiace 99 Fuel filter change

Look first right rear back under fuel tank,< If not, follow fuel lines from fuel tank one main line, one return line, traveling parallel to frame all the way to the motor compartment on front, can be front under right passenger side, first by the filter at the auto parts, that way you will know what to look for

SOURCE: grinding sound on pressing clutch in at high revs

The grinding sound may be a throw out bearing or the pilot bearing. The sticking throttle problem sounds like a linkage or cable binding up from possibly damage due to the impact from the accident.