Driver's Licence:
Lack of this won't prevent you from applying, but it would be expected that all employees can drive. Positioning by hire car is an occasional requirement, although there is always an option to request a taxi. However, the company preference is that you can drive. I doubt you will find time to learn whilst completing the ATPL, so I recommend you get this done ASAP.
Swimming:
Fortunately, the company have yet to request you swim to a duty, but during your first week of induction you will complete wet drill, which involves faffing about in the swimming pool learning how to use lifejackets. Basic swimming ability is a must, and I seem to recall that you will be expected to complete one length of the pool wearing the jacket. The ability to swim 50m should more than suffice for these purposes.