During a kidnap boy is trying to rescue girl. The chase ends up in some kind of junk yard where girl with armor guy are zapped to future. During this chase scene they (probably just the boy, I can not remember) are almost hit by a car. We later find out that:

The guy in armor was actually our protagonist boy.  
Car was also driven by boy, with a girl as a passenger  

In the future, where girl (and at some time also boy) are being kept imprisoned underground, there are two robots. And the end of the movie we find out that they are caretakers for the Earth, which became a reserve (most of the time we rather seeing just one big robot, the other one,that the robots misunderstood instructions and they actually made those armors based on the drawings left by girl and boy. We then find out that it was boy and girl who where actually pretending to be terrorists and kidnapped themselves from the past to preserve the timeline
Boy and girl at the end of the movie tell they story to a friend. He is so inspired that he became politician, someone important, and it is he who actually makes a law, which became the protocol by which robots were using the "who ever came first" rule.

Hope that's enough, because it really bothers me that I don't know the title of this movie.
UPDATE:
Some more things I remembered:

Main protagonists are in their late 20-something
The movie does not necessarily show events in