re: Going to Paris w the family (4 total)

I've used booking.com to book quad occupancy hotel rooms and suites. Use the filter to search for what you want.

A typical roundtrip flight will probably be in the range of $1500 per person in summer.

If you don't already have passports for everyone, get them ASAP. If you already have passports, make sure they don't expire within 6 months of the return date. Adult passports are good for 10 years, child passports for 5 years.

Stay away from popular restaurants in the tourist centers. They're all overpriced and not very good. Ask the locals where they go to eat.

Use the metro system, its very efficient. However, be careful as it can get very crowded and always have your wallet either in a front pocket or use a neck pouch or money belt.

Never have only one person carrying all the money and credit cards in Paris. Split them up. Don't carry more than a couple hundred dollars worth of currency. If you need more, then use your debit card at an ATM. Use credit cards to pay as much as possible.