Yes new seals,brake cleaner possibly new pistons if badly corroded & can't be cleaned some red rubber grease for reassembly,new brake fluid.
Have you tried just cleaning it, remove pads,pump pistons out a bit on one side by holding the other side in then do the same for the other side, spray pistons with brake cleaner or use meth spirit with a small toothbrush/brush allow to dry, then apply red rubber grease around pistons push them in, pump them out a bit & so on & see if they move easier. Assembly brake pads in caliper remember to apply copper anti seize grease or better still some Ceratec to back of pads. [img alt=Smile]http://foc-u.co.uk/Smileys/efocicon/smile.gif[/img]
Have you tried just cleaning it, remove pads,pump pistons out a bit on one side by holding the other side in then do the same for the other side, spray pistons with brake cleaner or use meth spirit with a small toothbrush/brush allow to dry, then apply red rubber grease around pistons push them in, pump them out a bit & so on & see if they move easier. Assembly brake pads in caliper remember to apply copper anti seize grease or better still some Ceratec to back of pads. [img alt=Smile]http://foc-u.co.uk/Smileys/efocicon/smile.gif[/img]