Short answers, pulled from the story.
István Széchenyi stood on the battlefield of Raab on the 14th of June 1809 as a seventeen-year-old Hungarian noble. He fought with distinction during the Napoleonic Wars as part of the Austrian army after entering military service two years prior to this clash.
In 1825, István Széchenyi gained wider reputation by supporting Pál Nagy's proposal to establish the Hungarian Academy of Sciences. He donated the full annual income of his estates that year which amounted to 60,000 forints to help gain Royal approval for the academy.
István Széchenyi established the Óbuda Shipyard on the Hungarian Hajógyári Island in 1835 with help from the Austrian ship company Erste Donaudampfschiffahrtsgesellschaft. He also supported construction of the Chain Bridge between Buda and Pest and promoted steamboats on the Danube, the Tisza, and Lake Balaton.
The political relations between István Széchenyi and Lajos Kossuth were not good because Széchenyi always thought Kossuth was a political agitator who overplayed his popularity. Széchenyi believed economic reforms should proceed slowly while Kossuth rejected the role of aristocracy and questioned established norms of social status entirely.
István Széchenyi committed suicide by a gunshot to his head on the 8th of April 1860 at the age of sixty-eight years old. His death occurred after he suffered a complete breakdown in early September 1848 and spent time recovering at the private Asylum of Dr. Gustav Görgen in Oberdöbling.