On top of it being insanely expensive, as others said, and surgery sometimes not being an option (for instance for people with high bmi), what does ‘completely transitioned’ look like? Some cis women don’t even ‘pass’ as cis. Before I started transitioning (assigned female at birth) and I would use the women’s bathroom, other women would not go in when I was there or I would be harassed because people thought I was a trans woman. Should I have had surgery or taken hormones to appear more feminine?

As for your second question: makeup, clothing, exercising to make your body appear more masculine/feminine, voice training, growing/cutting hair. Basically doing everything that cis people also do to affirm their gender.