Yes.. you need to provide to and fro flight tickets and accommodation bookings.. for the sake if visa application you can book accommodation of hostels which have 100% refund on cancellation.
You can try hostelworld.com for accommodation
Ya defently for applying for visa there you are firstly needed to book you going as well as returning flight tickets. also you are needed to show you accommodation booking like hotelsor hostels, but it's not rqd if any body is ready to host you. you are needed that poof.
Yes. you do require to book your flight tickets prior to visa application. also, you need to have confirmed hotel bookings. if you are going to visit several countries within Scehngen area then it is recommended that you book the internal transport also before visa application. Not all, but some countries may require it.
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