hi,

could you specify the name of device, please?

Generally, you are free to play with timers as you wish. They do not influence on each other. However, there are some exceptions:
- timer 0 in mode 3 splits into two 8-bit timers; second one is controlled with control bits of timer 1. Fortunatelly, timer 1 still may be used, for example, as baud-rate generator. It may be runed/stoped but it cannot produce interrupt during timer 0 is in mode 3.
- timer 2 has nothing with timer 1 except that each one may be used as baud-rate generator. Here: if you use UART with variable bitrate mode then you have to select which timer will be used as source of transmit and receive clocks. Some derivatives have additional baud-rate generator and so this point is eliminated.

Thanks,
Oleg