If I buy Ignite for davinci resolve do I get the hifilm(mocha) tracker?
No. Hitfilm Mocha is included with Hitfilm Pro and available as an add-on for Express, but not as part of Ignite.
I do not believe Mocha works with Resolve. Boris lists Mocha as compatible with Fusion - so, I suppose it works in the Fusion Module of Resolve, but you're looking at Mocha Pro for that.
Mocha Pro is expensive. You'll want to wait for a sale.