Just bought a truck need to get it to new company???

You need the sign on the door since your not under any authority. The sign means its ok since your not taking a load. Id stop at scales to be on the safe side although legaly you may not need to depending on state regs. If a dot cop sees you fly by though he may pull you over not seeing the not for hire sign at 65 mph. Id keep a log. If you need the sheets any truckstop sells blank ones. Even when running personal conveyance you need to log it. Its still a commercial vehicle...and my interpretation is you need a log unless you register it as recreational. Unless your planning on driving over 700 miles in a day, you can log it to be on the safe side.