One -- fortunately, Germany would never have developed a bomb. They dropped out of the bomb project in late 1942. They believed they didn't have the resources needed to make one, other projects had higher priority, and that if the bomb could be created would take several years of effort, and wouldn't be needed during hostilities anyway because Germany expected to defeat their enemies quickly. Had the Cross-Channel attack not occurred around the time it did, it's quite possible that the bombs would have been dropped on Germany.
Two, Japan wanted a separate peace, not a surrender and subsequent occupation of the country. They rejected surrenders of any kind several times before the bombs were dropped, both from the Allies and from their own diplomats in Europe. It wasn't until the two atomic bombs were dropped and the Soviet invasion of Manchuria that brought them to accept the terms of unconditional surrender from the Potsdam Declaration.
Three, I don't see what dropping the bombs has to do with Russia. Stalin already knew through his espionage networks that Britain and the U.S. were developing atomic weapons, and he used the information his spies harnessed to help Russia build a bomb of his own. Truman even told Stalin at the Potsdam Conference that they had a few bombs that they hoped to use on Japan (Truman knew that Stalin knew that the U.S. had been working on atomic bombs, but not that they were successfully testing them), and Stalin merely hoped that the U.S. would use them. What the U.S. wanted as far as the original plan went was for the Soviet Union to tie down Japanese troops in Manchuria while the Allied forces would invade Japan itself.
Fourth, the bomb saved thousands of lives on both sides. There wasn't only the anticipated invasion of Japan, but continued bitter fighting in Southeast Asia, and the Japanese plan of slaughtering any POWs in their hands had the homeland been invaded. The two bombs and the Soviet invasion prevented all of these from occurring and brought a long and bitter war to a quick and abrupt end.