my x is gettin on a little now and starting to squeak with a little knocking coming from the front

so i was thinking or replacing them all, has anyone got an idea of how much i would be looking?

ive had a read through some of the diy's and think it may be a little too much for me to tackle, or am i just putting myself down

i am quite good at changing brake discs and pads, would prob even attempt an exhaust change but the bushes seem a lil complicated