There is no evidence of tornadoes on Jupiter. The Great Red Spot has sometimes been compared to a tornado, but in reality its dynamics are completely different.
Tornadoes can happen in any place that gets thunderstorms.
No. There are enormous, magnetically-driven vortices of plasma on the sun that have been compared to tornadoes. However, these are not true tornadoes as they operate on entirely different mechanics.
No. Mercury has essentially no atmosphere. There are no storms of any kind there.
Tornadoes happen in Miami for the same reason they happen anywhere else. See the related question for how tornadoes form in general.
The term you are looking for is tornado watch.
Tornadoes can happen in Ottawa. Canada does get tornadoes, though not as often as the U.S. due to its cooler climate.
Tornadoes can happen anywhere in the world except cold areas like Antarctica and the north pole. Tornadoes are mostly common in United States.
Yes. Tornadoes, including some significant ones, can and do happen the the Philippines.
Tornadoes happen in the summer every year.
Most tornadoes in the U.S. happen in spring and early summer.
Tornadoes can happen anywhere - they're usually formed from severe thunderstorms.
Sicily Tornadoes happened in 1851.