Fr. Seraphim's teaching about the "toll houses" is controversial and not commonly accepted teaching in Orthodoxy. In fact, it is accepted by a tiny minority in the contemporary church. There are arguments about the validity of this teaching elsewhere on this forum. (Watch all the supporters comment hereafter.)
Off the top of my head, here is some of the church's guidance in this regard:
"A Christian ending to our lives, painless, blameless, and peaceful, and a good defense before the awesome judgement seat of Christ, let us ask of the Lord." The Divine Liturgy, among other lesser services.
"I look for the resurrection of the dead and life of the ages to come," 12th Article of the "Symbol of Faith," (the Creed).
"But I do not want you to be ignorant, brethren, concerning those who have fallen asleep... For if we believe that Jesus died and rose again, even so God will bring with him those who sleep in Jesus...For the Lord Himself will descend from Heaven...with the voice of an archangel, and with the trumpet of God. And the dead in Christ will rise first. Then we who are alive...shall be caught up together with them...to meet the Lord in the air. And thus, we shall always be with the Lord." Epistle Reading for the Funeral Service, 1 Thessalonians 4, 13-17.
The church does not have dogma (teachings that must be believed in order to attain salvation) in regard to what happens upon passing from this life. There are prayers for the separation of the soul from the body, for the "blessed repose" of the soul, and its "pardon, forgiveness, and remission of sins. " The church hopes, but does not know, if these prayers are efficacious.
Dogma in the Orthodox Church is always based on scripture. There are "theological opinions," known theologically in Greek as "theologoumena," in the Orthodox Church, matters which may or may not be believed by the faithful. Commonly accepted "theological opinion" based on writings of the ancient Church Fathers (which I can't cite off hand), in this regard, is that the soul receives a partial judgement upon death, a "foretaste" of their "final judgement," and that the soul does not experience time. Also commonly accepted, is that the soul's guardian angel argues with the devil, before Christ, citing the belief and good works of the person's life on Earth, in order to secure the foretaste of the final judgement. Again, this is not required belief for Orthodox Christians, but only a "theological opinion."