help on TDA, 401k, tax-exempt

I would like to know in USA, is TDA account define contribution,plan? what normally you put inside, bond or equity? bond interest tax rate higher or equity capital gain tax rate higher?

which asset class you normally put inside Tax-exempt account?

which asset class you normally put inside taxable account?

besides 401k, company pension, what else we have for TDA, taxable, Tax-exempt?

put bonds in TDA and equity in taxable account

Or, more generically, put income generating securities in a tda. But securities that naturally defer taxes (like equities) in a taxable account (b/c typically, tda’s are capped at a certain $$ amount.

tax exempt account nothing to put? how about IRA account? mutual fund? Treasury? cash?