Greetings, @anita1, we appreciate the question. In general you can add time to your domain at the time of transfer as long as you don't exceed 10 years (a registry limit). When you order a transfer you get a year added when the transfer completes as long as you haven't renewed in the last 45 days.
As for privacy, that is proprietary to each registrar, so unlike previously registered time, we cannot recognize another company's privacy service.
I hope that helps,
Thomas D. - GoDaddy | Community Moderator 24/7 support available at x.co/247support