Which parts are these? Large yellow and orange pieces with Technic pin holes
The two parts on the right are Cockpit 6 x 6 x 5 with Hinge (30619). These have been used to make cockpits in LEGO Juniors and other very simple, low-part-count sets such as 4652:



The part on the left is Engine Block 4 x 6 x 2 with Wedge Cutouts and Technic Holes (45407). It is used to make up the front section of the tow truck shown above and has been used in similar ways in a few more sets in different colors.