For coffee and croissants you might try La Baguette. It is almost to the traffic light going to Buddha Hill. Not a bad walk from Jomtien.
La Baguette - The French Bakery
www.labaguettepattaya.com/
La Baguette @Pratumnak Hill Jomtien. 480/47 Moo 12 Thappraya Road Pattaya City Banglamung Chonburi 20150. Tel: 038 252516 Fax: 038 252517