Choke and gear lever.
Dabbsy's right about the choke, each bike is individual. Having said that, I've had dozens of CB125/CB100N/SL125's which are all basically variations of the same engine/carb set-up.
If everything is working as it should, and the bike properly serviced, my start-up routine would be; ignition off - gently kick bike over (not literally) a couple of times to get the oil pump forcing some oil up to the top end of engine (this is where most wear occurs on these engines - especially from cold). Ignition on, fuel on, choke fully on. Bike should start first kick. Let her run for a few seconds on choke, you'll feel and hear her starting to 'fluff' for want of a better description. At this point ease her onto half choke. Keep the revs as low as possible, but without labouring the engine - I always tried to keep mine around 1400rpm. Cold engine + lots of revs = knackered top-end.
Engine should be at point now where you can ride her; run her through the gears and you should find that by the time you're in third, you can knock choke fully off. Let the engine build some warmth before thrashing it. The kindest thing you can do for these engines is give them regular oil changes.
Your absolutely right about the gear lever. Probably held in place by a 6mm threaded bolt which has a 10mm spanner size head. Undo bolt and fully take out then gently pull gear lever off. The lever and shaft have splines - just rotate the lever round to where it's comfortable for you, then insert bolt and re-tighten.
Hope that helps, Rick.