Board Thread:Questions and Answers/@comment-26196925-20160102095932/@comment-25669516-20160102183025

Nope, there is no guarantee you'll get something good from lottery (most days its just 20 elixir, 20 panacea etc... Not good) so unless you can backup & restore your data- avoid lottery.

Don't remember the exact cost of Silver Flak because I got it a while ago but its either 120,000 coins or 160,000 coins. Some other Wikia member would confirm it soon.

Since you've not played multiplayer at all, you'll start at beginner's league. For that your weapons are adequate. Make sure you atleast have the gunner set though (you can get it free from the daily lottery). If you are good at racing missions then I'll suggest you get the horse first. You can then alternate between Los Arcos and Eagle Eye missions to grind for coins. Also you won't find many players using Silver Flak before you get to silver league...