String Gauges

First and foremost, this is my first new thread.

As the topic title suggests, I have some questions about string gauges. First, what's the "standard" string gauges, B-G? When I go to buy strings, I notice that some strings are different than others (obviously) and I'm not sure which ones are standard and which ones are heavier or lighter.

Second, what do heavier and lighter gauge strings offer? I would assume that heavier gauge strings offer more body and perhaps "umph", whereas lighter gauge strings are clearer and have a bit more punch. Am I correct in thinking this? Also, lighter gauge strings would be easier to play than heavier gauge strings, right?

Finally, what string gauges (heavy, standard, or light, or even numbers if you want to be specific) would you suggest for a bassist playing in a 3 piece (technically 4 with the vocalist, but he doesn't play an instrument) rock band, who's looking to create a Noel Redding/John Entwistle sound? I'm hoping to achieve a nice warm, round tone, but with some punch as well.

Thanks.