The long bolts locating the rear struts are notoriously bad for seizing. You may need access to heat but it needs to stay away from the shock absorber body!
The rear calipers are prone to be problematic. If the footbrake works on that side it could be the adjustment mechanism is not working.
Release the pressure from handbrake cable - you can do this by slackening off the adjuster under the handbrake or you could disconnect the cable (double check that the inner cable has not seized on the ferrule at the end of the cable). Make sure that the handbrake lever is fully retracted. Pump the footbrake a few times to bring the pads up to the discs. Re-attach the handbrake cable and adjust out the slack.
"When you sit in a Focus RS or a Golf R32 itís like sitting in a commercial for Lynx aftershave. When you sit in an 147 GTA itís like sitting in a Venetianís hand-made suitcase." J.Clarkson 2003.
Current fleet: 156 Sportwagon jtd 16V (facelift) 2.4 Spider, Leon Cupra SC
Projects: Spider S4, Matra Murena 2.2