The tv show, 66. The comic, I don't know. i believe his first appearance was in detective magazine in the 30's. Check DC's website.
100 years ago cricket started
many years ago
I'm afraid not. Lego Batman ended years ago and will not be returning sadly.
1950
it went endangered 5 years ago
Yes for example "Many years ago I was in love." or something
The Great Fire of London was in 1666 - 344 years ago.
Ballet first started in the early 1600's
In Finland, 4000 years ago
Batman (1943) starring Lewis Wilson was the first Batman movie.
His shoe-string start-up of years ago has made him rich.
Actually, there is a great answer for this. There was a multiverse book that was done a few years ago by Doug Moench and Kelly Jones where Batman was actually a vampire.