Wellll
first of all you will need a good quality bike, i highly advise you to NOT get a chinese cheap imported bike, they fall apart and u end up paying more to get it fixed than it is worth. depending on your hight and riding ability, you will get a bike based on that and also price, go to your local dealer, ktm honda yamaha suzuki and try and sit on the different kinds of bikes, if you want a race bike they are a really powerful or if you want a trails bike suited for forest/ bush etc etc
second of all you will nead gear now it all varies in price depending on brand name, you will need a helmet, boots, gloves, goggles, jersey top, jersey pants, socks, chest plate or pressure suit( body armour)
they are the things i advise you to wear when you ride especially for the first time, it may be uncomfortable at first but you wll get used to it
third you will need somwhere to wear, check out your local track and practise alot, you can get race information there if you want to take it further or you can ride opn private property and then ride trails(forest wher your older)
Just remember to have fun and be safe
