Hello Krishna,
For your first question, You can't create a bundle job with out coordinator. Each layer in oozie is an additional layer to the previous ones. Like if you need to schedule an workflow, you need coordinator as well as workflow. Same way bundle comes to play when you have more than one coordinators to be started at the same time.
And for your second question, I would suggest you to try by setting the frequency in coordinator more than the difference between start and end time. Like setting it to run only one time a day and give the end time within the same day, and more in similar ways.