Being a mechanic newbie, I did my tb job without any of those and didnt seem too hard. But my crank bolt was already loose so I cant speak to that. I just put it in gear to retorque the crank bolt.
Probably would make it easier but definitely not necessary. Worth 50, not sure. Maybe if you have more money than time then perhaps...i was the opposite, though, I went the cheap route.
The ninja tool is cool though. Id like to have on just for a keychain.