No metering unless you buy a metered prism(lots of $$). Even with the metered prism, you still get no autoexposure-it's just a built in TTL meter. The 503CW does support TTL flash, but only with compatible flash units. No autofocus either under any c...
Any lab will develop 120 film .. it is the film that the pros use when shooting in medium format.
The only difference is that if you are using a metal developing tank you will need a new reel for medium format, or if you are using plastic reels then you need to make sure they are adjustable. Developing procedures are based on the film, not the si...