Hi Khaled, I am new to this place as well. I can help with some of ya questions. I used to work for Toyota doing parts for 5,1/2 years. With the screen for the r/camera, if you want to stay with genuine, the only option is to go for the complete Toyota Sat-Nav package. This is a whole complete new stereo head unit. There is a bit involved with fitting (more fiddley and time consuming than anything) but easy to do. Down side is, from memory you are looking at just under 4k. With the motor swap, wont happen as it will cost you tooooo much money to do. TRD changed a few things when they bolted on the SC. Diff engine ECU, brakes, injectors act-ect-ect. Even if you pick up an engine complete with harness, ECU and so on, will still cost a heap to bolt it in, but it will fit. I have put some feelers out to various people about SC kits for my Sportivo, but nothing back yet. I am getting about 600k out of a tank on standard unleaded with 70% of that around town.No need to run Premium at all.