Without examining it's difficult to precribe any medications. Consult a dermat to get it checked.

It sounds like you may have acne and skin condition like seborrheic dermatitis. To manage these conditions wash your face twice a day with a gentle cleanser. Avoid touching your face, use noncomedogenic skincare products, try acne treatments, and use a moisturizer. If the symptoms are severe, consult a dermatologist for specialized treatment.

Psoriasis can be a chronic skin condition that require ongoing treatment. If you have tried several treatments without success, then discuss with a dermat to determine appropriate treatment plan for your condition. Medications, phototherapy, or biologic treatments are few options. Moreover you can try to avoide stress, smoking, and alcohol, and maintain a healthy lifestyle.

Dryness or itching are usually due to fungal or allergic infection. Don't use almond oil or any other product on the affected area since it can worsen the condition. Consult a dermatologist and let them check and they may recommend a topical ointment or antifungal or antibiotic cream. 

The skin appears darker or more pigmented usually after the first session of Q-switch laser treatment for hyperpigmentation. The treatment causes a temporary inflammation in the skin, which increases melanin production and darkens of the skin. 
Talk to your dermatalogist as they can adjust the treatment parameters or suggest alternative treatment options based on your skin type and concerns.

Consult with a dermatologist for Perioral dermatitis treatment before considering hair transplant surgery. The dermatologist can evaluate you condition and provide treatment acccordingly. Once your condition is under control, you can discuss hair transplant options with a hair transplant surgeon.