Pimp Boy

I own a black Subaru Impreza WRX, about a month ago it was off the road for a couple of weeks, which felt like a year or 2, & the other day the revs seemed a little high & there didnt seem to be much boost & then all of a sudden it became damn near impossible to put it in gear.

Im pretty sure the clutch has gone, does anyone know if the engine needs to be taken out completly for it to be replaced???