Yes, live dealer games are legal and available at online casinos. Popular live dealer games include blackjack, roulette, and baccarat. There are plenty of other games on offer too, such as Ultimate Texas Hold'em, three card poker, Football Studio, and Buffalo Blitz.
Yes, you play for real money at a live casino online. You can make deposits and wager just as you would with a regular online casino game. Typically, live casino games only feature at licensed and legal real money casinos in the US.