For Roulette, Inside bets allow the player to bet on specific numbers or a combination of numbers. Types of inside bets are a straight bet; chose only one number with the highest payout. Split bet; put your chip on a line between 2 numbers. Street bet; betting on 3 numbers with the same chip and placing your chip on the outside edge of the last number. Corner bet; betting on 4 numbers by placing your chip where all 4 numbers meet. Five number bet is made by placing your chip at the intersection of the 2 numbers. Not the corner that joins the two.
Outside bets are placed outside the number system and include bets such as red or black, odd or even, columns, high or low and dozens.
Hope this helps a bit.