Tehran, Iran — Special UN peace envoy Olof Palme began work here, scheduling meetings with Iranian Prime Minister Muhammad Ali Rajai and President Abolhassan Bani-Sadr on terms for ending the Iran-Iraq war. Asked if Mr. Palme would meet Ayatollah Ruhollah Khomeini, an aide replied, "Not as far as I know. The hosts will make up the program, not us. Our visit is expected to last until about Friday." Mr. Palme is then expected to visit Iraq.