I haven't actualy done Renault rear discs or pads. However, I'm fairly certain that the rear discs come with the wheel bearings. So, check that if you spot some really cheap ones and also weigh up if a cheap wheel bearing and disc makes long term sence.
If you buy genuine discs they come with bearings & abs rings . But you will need to by new hub nuts £6 each from the stealers . I changed mine a few months back & I didn't trust reusing the hub nuts as they have nuylock inserts . You will also need a piston wind back tool ( take the cap off the brake fluid bottle ) this makes it easier to wind them in. Torque the hub nuts to 175nm & job done.. Oh & apply nut lock on the calliper bots when refitting ..
As Munson points out, a caliper wind back tool would be a big help. Thats for rotating the caliper piston whilst pushing against it. This allows the piston to retract back which otherwise would be held by the calipers internal self adjusting mechanism for the hand brake.
Also, a 15mm spanner thin enough to fit in here... hammering in a thicker spanner will work, but will probably damage the rubber boot leading to the slider seizing up in the future.
google pic found on tdiclub forum but the same style TRW rear caliper is used on the 133