I have a dumb question. Will one camcorder usually have one lens?

Question

Or one camcorder has three or two lenses that can capture pictures from three or two sides?

Answer 1

you may have seen pics old old cameras that seem to have 4 lenses. only one lens was used at a time and could be rotated to use a different size if required.

generally speaking there are two types of lens -

In film and photography, a PRIME lens is a photographic lens whose focal length is fixed, as opposed to a ZOOM lens which can move in and out on subjects.

you'll have to use several cameras in order to capture footage simultaneously.

Answer 2

Not really sure where you have come to the conclusion you can have more than one lens on a camcorder (consumer version that is).

To my  knowledge exchangeable lens are pretty much reservied for very expensive professional cameras such as used by TV news organizations.  A lens alone for one of these cameras would take most folks a life of savings to afford.  

Having said that, there is one... The Canon XL series (prosumer) model I think has options for interchangeable lenses, but again, you are well outside the budget unless you do this sort of thing for a living or are just filthy rich with money to burn.

Maybe expand on your question to better identify what it is you are looking for?