It has to come apart to do a thorough job.
Taking it apart:-)
No for best results the Carburetor needs to be removed and completely disassembled. This helps in cleaning out the jets and small passages, Recommended to be done by an experienced mechanic in that field.
no
you would have to look it up or else just take it apart.
No way to tell without taking it apart.
There are several reasons there can be a leak. However, you will want to take the carburetor apart for any leak - purchase the carburetor kit and carefully take it apart. Use the rebuild kit to replace gaskets, etc. and when you put it back together, the leak will also be fixed. Do not use gasket sealer on the carburetor.
play with it for a long time
find one stupid
You cannot do that effectively without taking the fittings apart,
There are various possibilities. One is that the fuel line is clogged. Make sure the fuel line is free of dirt and clean. Another thing, the carburetor float may be stuck. Third, old gas could have jellied inside the carburetor which makes for dissassembly and cleaning. Still another possibility is a clogged fuel jet. I would advise taking the carburetor apart and clean it after checking the fuel line, since if cleaning the fuel line won't help then it is a carburetor problem.
taking apart a preserved specimen is called
you must take the steering column apart I hate to say it but that is the only way