They had:
1 Keeled boat light strong at least 60 feet in length her burthen equal to 8 tons
1 Large Wooden canoe
They also had horses, walked, climbed, and used pirogues. "Pirogues" is a French word meaning that they tied smaller canoes together to make a kind of raft. Their horses were certainly used as pack animals in the rough country, and for riding when they crossed the flat plains.
Most likely, yes. Compasses were in regular use well before the time of Lewis and Clark.
to death
Wax
No, the Oregon Trail was used by people moving to settle in Oregon later in the Nineteenth Century. It didn't exist yet when Lewis and Clark surveyed the land the United States gained in the Louisiana Purchase. In fact, the Oregon Territory was not even a part of the Louisiana Purchase.
During the expedition, they had to use math to measure the heights of mountains, the width and depth of rivers, also various astronomical observations, they had to measure longitude and latitude almost constantly, figure out temperature, etc. :)
Lewis and clark mostly used boats.
No
Most likely, yes. Compasses were in regular use well before the time of Lewis and Clark.
they use deer for meet
the sextant
to death
Wax
A Gun and Fists
yes and they ate it
They were explorers. They probably needed them for defense, or other use.
Yes they used a covered wagon
2,500 dollars.