All the big names are offering a new ish box which covers a lot of countries in one box. Personally the biggest two/best for european coverage are DKV/UTA. Theres also AS24. Obviously they do fuel cards aswel.
If you start heading east most boxes can be obtained at the border and used as a pay as you go basis. Again a good fuel card helps with this.
If your smart some european tolls can be done online.