5) Do I need to print my boarding pass if I check in online?

TUI flights
Yes, you'll need to print each boarding pass clearly on an individual piece of A4 paper. The barcode on the pass will need to be scanned at the airport, so the page mustn't have any rips or tears. Your boarding pass is an official security document, so you'll need to keep it safe until you reach your destination. Just so you know, we can't accept any unclear, faded or blurry boarding passes.

If you can't print your boarding passes, you can collect them from the TUI bag drop desk when you arrive at the airport. 
Go to online check-in