Welcome to the Bunnings Workshop community. Thank you so much for joining us and sharing your question about building a truck bed from better homes and gardens.
It's great that you've decided to build this amazing bed project. I'm so sorry but the saw at the shops are not able to cut complex cuts and angles. However, if you have the cutting plan for this bed, you can engage the services of a handyman to cut the panels for you. Making it possible for you to enjoy the assembly process.
If you decide to tackle this project head on I suggest using a Ryobi 600W 85mm Jigsaw. This single tool will allow you to cut all the complex angles and the circular wheel of the bed. It sounds like an exciting project, any updates you can provide while building it would be much appreciated.