For 2016, the maximum IRA contribution is $5500 ($6500 if you were over 50)
You can always contribute to a traditional IRA, regardless of your income or coverage by an employer plan.
The deductibility depends on your income, filing status, and employer coverage.
These links provide the most recent income limits for deducting IRAs
IRA deductibility - covered by employer plan (the "retirement plan" box on your W2 is checked)
