Can a transistor amplify voltage?
A transistor can amplify current, or voltage, or both, depending on how it is configured in the circuit. A bipolar transistor configured as 'Common Collector' amplifies current, but not voltage. When configured as 'Common Base' it amplifies voltage, but not current. In 'Common Emitter' mode it can amplify both. 

Ultimately the goal is to amplify the power of the signal, so most transistor amplifiers use 'Common Emitter' mode because power = voltage x current so amplifying both can provide greater amplification. However sometimes one of the other modes is more appropriate. 

Common Base mode is sometimes used at high rf frequencies due to its wider bandwidth and greater stability. Here is an example of the 'front end' of an FM tuner, showing a junction FET in 'Common Gate' mode and an NPN bipolar transistor in 'Common Base' mode.