Final answer:
Tobias would require a rope, horse, knowledge of cattle behavior, physical strength, a rifle for protection, and possibly companions to effectively round up cattle.
Step-by-step explanation:
To round up cattle, Tobias would need a variety of tools and skills. Primarily, he would require a strong rope for roping calves and possibly a horse to help cover ground quickly and manage the herd. Additionally, he might need a good understanding of cattle behavior to effectively drive and corral them, as well as physical strength and endurance to manage the demanding task of moving cattle over distances. Other useful items might include a rifle for protection against predators or rustlers, and companions such as working dogs or other individuals to assist with the cattle drive.