How much can i or my spousecontribute to our traditional IRAs and be able to fully deduct it if my spouse has a work 401k?

It depends on your age and your income.  Click on these IRA links to determine the amount each of you can deduct.  

2022

• IRA Deduction if You ARE Covered by a Retirement Plan at Work - 2022
• IRA Deduction if You Are NOT Covered by a Retirement Plan at Work - 2022 (deduction is limited only if your spouse IS covered by a retirement plan)