Heads up! All javascript plugins require the latest version of jQuery.
Here is the current release link for jQuery
There are a number of elements to the Bootstrap “product” – one of them are JavaScript Plugins – only these require jQuery – and they extend the jQuery functionality so yes all jQuery methods / functions are available. The remainder (CSS, Scaffolding, Components etc) require HTML and CSS (or a combination)
jQuery is not included within the Twitter Bootstrap download – you must download it / link to a CDN version of it
EDIT:
2.X requires atleast 1.7