Is tossed a pronoun

No, the Word 'tossed' is a verb, the past participle, past tense of the verb to toss. The past participle of the verb also functions as an adjective.

Examples:

Jack tossed an tomato across the table to Kim. (verb)

Kim cut the tomato into pieces for a tossed salad. (adjective)

The Word 'toss' is also a noun; a Word for an instance of being thrown or flung; the distance that something is thrown; an abrupt movement of the head; the flip of a coin to decide an issue; a Word for a thing.

A pronoun is a Word that takes the placed of a noun in a sentence.

The pronoun that takes the place of the noun 'toss' is it.

Examples:

The toss was in my favor. It came up heads.

He gave an indignant toss of the head. Itdislodged his toupee.