How much is a one thousand dollar note from around World War 2 worth?

I think you mean WW II, not 11 (thankfully there haven't been eleven conflicts...)

There are no $1000 notes dated later than 1934 so you could not have one from the Second World War. In any case, 1934 and 1934-A bills are worth between $1100 and $1600 in average condition.