I owned a condo before I got married and I plan to get a divorce, do I have to give any money to my wife?

If you paid down the mortgage against the property with income you earned during the marriage as community property, then your wife may gain a right to an economic reimbursement (not ownership rights) to the extent the mortgage is reduced.

Probably, unless she waives claim to it. Please give all pertinent information to a family law attorney and find out for sure.

Probably, yes. If she requests it, she can be reimbursed for improvements you made to the investment/property while you were married and part of the money that was paid down on the mortgage. You will need to look into all the records of what was spent or paid down on the condo during the marriage if she requests reimbursement.