speed-demon

hi my lupo has a real problem when selecting first gear it sort of gets half way then gives up and becomes really stiff to put in to gear, sometimes i have to put it in second first then put it up to first but its still stiff, i got told to take it on a long drive so i took it out for about 30 mins and it was a little better but there was still a problem there. every so often it will go in no worries but its becoming a real pain anybody help !!

my lupo 1.4 sport is makin a whistling noise that goes when you put the clutch in also its getting a bit stiff to select all gears any ideas on what could be the problem, im unsure on wehter i need a new gear box and a clutch or just a clutch