The Mars Pathfinder Lander weighed 551 lbs, it had a lot of tools and instruments such as a APXS Deployment Mechanism which is a locator so the rover won't get lost. It also has tools to do tests on Mars, like magnets to measure magnetic properties.  The Pathfinder was last heard from September 27th, 1997, it lasted 3 times longer then expected. The Pathfinder was only designed to last from about a week to about a month, but it ended up lasting 3 months. In all the Pathfinder took 16,500 pictures. It was eventually named the Carl Sagan Memorial Station after the 20th-century American astronomer. 

The Mars Sojourner Rover weighed only 23 lbs, it moved at slow 0.4 m/min. The Rover could carry a 1.5 kg load/rock.  The rover covered more than 330 feet on the Mars surface, it took 550 pictures, and it never went out more than 40 feet from the lander. The Sojourners first job was to analyze the rock "barnacle boy", it also analyzed other rocks such as "yogi", "scoobydoo", "conglomerate", and others.  It was named Sojourner in honour of the 19th-century African American civil rights advocate Sojourner Truth.