ATMs with a ‘Global’ sign work with internationally issued cards; very few are open 24 hours. Credit cards are widely accepted, except in the countryside.
Tipping is generally not expected.
Restaurants No need to tip; only top-end hotel restaurants will add a service charge.
Guides Not expected; a small gift will be appreciated, though.
Taxis No need to tip; fares are metered or agreed before you get in.
Hotels Only in the most luxurious do you need to tip bellboys etc, and only if service is good.