Who goes first?
From the publisher’s rulebook

Who goes first in Mouse Trap?

Hasbro English instructions, item C0431 (2016)

Roll the die to determine who goes first. The first player then rolls and moves clockwise.

Source & edition

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Our interpretation

This site reads “roll the die to determine who goes first” as the highest roll going first.

If there’s a tie

The rulebook doesn’t say.

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