ATMs are widely available. Credit and debit cards are accepted by most businesses in cities and tourist areas.
Turkey is fairly European in its approach to tipping and you won't be pestered for baksheesh. Tipping is customary in restaurants, hotels and taxis; optional elsewhere.
Restaurants A few coins in budget eateries; 10% of the bill in midrange and top-end establishments.
Hotel porter €2 per bag (mid-range hotel), €5 per bag (top-end hotel).
Taxis Round up metered fares to the nearest lira.