seized

Still working on my bike, thanks for all the help so far. My rear brake piston is seized. Any good ideas for getting it on unseized? I've seen guys use a pressure going to push it out, Is that a good solution or is there something better? Should I replace the piston and seals or could I get...

The bike is a 1983 Honda CBX 550F. I think the engine is seized. I've tried starting it with the starter, but all I get is a clicking noise. I have also tried rolling the bike in the highest gear, and it won't roll. I do however get a very very minute small swish sound from the exhaust. But...