Ticket to Ride Legacy: A Legendás Nyugat

Yes. This edition explicitly notes there is no restriction on the number of Locomotive cards you may draw during the Draw Train Car cards action (you still draw two cards total on that action). (See page 2.)

No. Locomotives act as wild cards only for Tunnel or Ferry routes and "can never be used to help claim a regular route." (See page 3.)

You lay down the required cards, then reveal the top three cards of the deck; for each revealed card that matches the color you used (including locomotives) you must add one more card of that color or a locomotive, and if you can't or don't want to you take your cards back and your turn ends (the revealed cards are discarded). If you played only locomotives, only revealed locomotives count as matches. (See page 4.)

You must play one Locomotive card for each locomotive symbol on the ferry plus the usual colored cards for the remaining spaces; you may play extra Locomotives as substitutes for color cards, and any three cards can be used as a substitute for a single Locomotive. (See page 3.)

No. A player may claim a maximum of one route on their turn. (See page 3.)

At setup you are dealt 5 and must keep at least 2 (returned cards are removed from the game); later in the game when you choose the Draw Destination Tickets action you draw 3 and must keep at least 1 (returned cards are removed from the game). (See pages 2 and 3.)