Using pick is not a matter of number of strings, it is rather a matter of personal preference or style of music you are playing.
With a 4-string bass, you can use both pick and fingers.
Yes, you can. However, most use their fingers. I play bass guitar and i only use a guitar pick on certain songs.
usually pick for better quality sound but thumb can be used
Yes he does in the video Dance Dance he does
Sometime before South of Heaven was released
A plectrum (not sure if I got the spelling right)
You can use a pick or hands to play fast, it just takes time and continual practice. One of the quickest and easiest ways to play fast is to practice with a pick.
Yes.
You can fingerpick using your....fingers or pick it using a plectrum/pick. Alternatively you can even pluck it or use a bow on something like a double bass.
usually pick for better quality sound but thumb can be used
It doesn't matter, but all the bass greats play without one. I personally don't, and you'll find that there is a great split in the bass-playing community - to pick or not to pick? Most don't, though.
Yes he does in the video Dance Dance he does
Sometime before South of Heaven was released
A plectrum (not sure if I got the spelling right)
A good technique on bass is what feels right for you and sounds right for what you're playing. There's no hard and fast rules on whether to use a pick, how many fingers to pick with, how low to sling it etc; it's what works for you.
You can use a pick or hands to play fast, it just takes time and continual practice. One of the quickest and easiest ways to play fast is to practice with a pick.
bass pedal
It depends what you mean... i know what you mean by electric bass but what do you mean by "Bass" If you mean an upright bass/double bass like thishttp://shannonspositiveimages.com/images/UprightBass.jpgthen with a few minor adjustments with the way you play you can.. To play an upright bass you need to use your hands all the time instead of a pick.. so finger picking is a NEED. Watch some youtube videos..
If you are referring to how people strum the bass. It is a matter of preference and there isn't really a dominant way to play the Bass Guitar. Which ever feels more comfortable is the way you should choose. I play the Bass myself, and I prefer a pick. I also play, and I use fingers only. I place my thumb on the pickguard and use my first two fingers to pluck.