Bull Meachem said:
No. There were pockets of abolitionist at the time and numerous states had ended slavery during Jefferson's lifetime. He had been exposed to their writings and he knew slavery was evil. He just didn't care enough to make his life more difficult.
He wasn't an ignorant rube who didn't know any better.
He was also a politician who cared about many things and slavery was just one of them. Had he freed his slaves and become an abolitionist he would have not only been bankrupted he would have lost all his political power in Virginia and thus not been able to have any influence at all. It's clear from his writings he struggled with ways to end the practice but he also knew the reality of the time.
What he did do though:
Author of the Declaration
Author of the Virginia Statute for Religious Freedom which set the precedent of not having a state sponsored church and then the 1st Amendment later.
Founded the University of Virginia
First Secretary of State, VP to Adams
Louisiana Purchase
Lewis and Clark expedition
Won the First Barbary War
He also asked Congress to ban the importation of slaves which he successfully accomplished in 1808. "The most terrifying words in the English language are: I'm from the government and I'm here to help."
Ronald Reagan