Toyota hiace first gear very hard when changing

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: Hiace Toyota

Near the foot-step on the front passenger door (open the door first!)

SOURCE: How do you disassemble toyota hiace 2006 dash?

Its easy, The only tool you need is a plastic lever tool. Or can be done with big head screw driver (but car for the trims for it can get damaged)
Lever both side vents out, then pull on the trim gently outwards. (long piece from glove box to the end of the radio before the instrumental dash panel) Then pull the main inturmental dash out towards you as well. There may by plugs connected to the front panel. Disconnect that and it exposes the digital meter, I think it then takes only 2 x 10m bolts and the dash is out.

SOURCE: MERCEDES NOT CHANGING GEARS

it should be in 2nd gear your gearbox is in limp mode need to have it looked at a.s.a.p ( the oil level may low)