A. It is always a good idea to keep your natural teeth for as long as you can. Baby teeth are not as strong as your adult teeth and will probably not hold any sort of restoration for very long.
Without examining your mouth it is hard for me to comment on what can be done for your front teeth. You possibly may be able to have some Veneers placed to perfect your smile or you may need a more complex treatment plan. I recommend that you book a cosultation with a cosmetic dentist to advise you on this.