I'm a bank teller but the work os so boring
Do most banks provide on the job training, 
Yes they ensure you keep up with new information and only certain jobs require college education
Being front line staff they are most likely to detect and stop fraudulent transactions in order to prevent losses at a bank (counterfeit currency and cheques, identity theft, confidence tricks, etc.). The position also requires tellers to be friendly and interact with the customers, providing them with information about customers' accounts and bank services. Tellers typically work from a station, usually located on a teller line. Most stations have a teller system, which includes cash drawers, receipt validator/printers, proof work sorters,
Bank teller
A bank teller (often abbreviated to simply teller) is an employee of a bank who deals directly with customers. In some places, this employee is known as a cashier or customer representative. Most teller jobs require experience with handling cash and a high school diploma. Most banks provide on-the-job training.
Tellers are considered a "front line" in the banking business because they are typically the first people a customer sees at the bank.
Responsibilities and Duties of the Bank Teller.