The answer to all of those questions is easily answered by Christ’s example of referring to scripture which had been handed down. The New Testament books were written by those closest to Christ and have never proven to be in error unlike the books of the Apocrypha. I would suggest you read the posts by daniel1212 on the canon. As for Sola Scriptura, it’s becoming more clear as time goes on that no other authority can be trusted especially the RCC, Mormons, Muslims, et el.
Then try answeing them, one by one. Be specific.
If you believe what you believe, you should have the answers.
I bet you won't do it. Because you can't.
*Partial list of references to Divine written revelation being written (Scripture) and references to it, substantiating the claim that as they were written, the written word became the standard for obedience and in establishing truth claims. In full, the New Testament is counted to have 275 direct quotes from and at least 600 allusions to the Old. The following list does not include all of the former, and rarely includes simple allusions to Scripture, but supplies a multiplicity of viewable (place mouse over reference, and if you cannot see them use a different browser, like Firefox) references to what was written or quotes thereof: Ex. 17:14; 24:4,7,12; 31:18; 32:15; 34:1,27; 35:29; Lv. 8:36; 10:10,11; 26:46; Num. 4:5,37,45,49; 9:23; 10:13; 15:23; 16:40; 27:23; 33:2; 36:13; Dt. 4:13; 5:22; 9:10; 10:2,4; 17:18,19; 27:3,8; 28:58,61; 29:20,21,27; 30:10; 31:9,11,19,22,26; 33:4; Josh. 1:7,8; 8:31,32,34,35; 10:13; 14:2; 20:2; 21:2; 22:5,9; 23:6; 24:26; Jdg. 3:4; 1Sam. 10:25; 2Sam. 1:8; 1Ki. 2:3; 8:53,56; 12:22; 2Ki. 1:8; 14:6; 17:37; 22:8,10,13,16; 23:2,21; 1Ch. 16:40; 17:3,9; 2Ch. 23:18; 25:4; 31:3; 33:8; 34:13-16,18,19,21,24; 34:30; 35:6,12; Ezra 3:2,4; 6:18; Neh. 6:6; 8:1,3,8,15,18; 9:3,14; 10:34,36; 13:1; Psa. 40:7; Is. 8:20; 30:8; 34:16; 65:6; Jer. 17:1; 25:13; 30:2; 36:2,6,10,18,27,28; 51:60; Dan. 9:11,13; Hab. 2:2;
Mat. 1:22; 2:5,15,17,18; 3:3; 4:4,6,7,10,14,15; 5:17,18,33,38,43; 8:4,17; 9:13; 11:10; 12:3,5,17-21,40,41; 13:14,15,35; 14:3,4,7-9;19:4,5,17-19; 21:4,5,13,16,42; 22:24,29,31,32,37,39,43,44; 23:35;24:15; 26:24,31,54,56; 27:9,10,35; Mark 1:2,44; 7:3,10; 9:12,13; 10:4,5; 11:17; 12:10,19,24,26 13:14; 14:21,47,49; 15:28; Lk. 2:22,23.24; 3:4,5,6; 4:4,6-8,10,12,16,17,18,20,25-27; 5:14; 7:27; 8:10; 10:26,27; 16:29,31; 18:20,31; 19:46; 20:17,18, 28,37,42,43; 22:37; 23:30; 24:25.27,32,44,45,46; Jn. 1:45; 2:17,22; 3:14; 5:39,45-47; 6:31,45; 7:19,22,23,38,42,43,51,52; 8:5,17; 9:26; 10:34,35; 12:14,15,38-41; 15:25; 17:12; 19:24,28,36,37; 20:9,31; 21:24; Acts 1:20; 2:16-21,25-28,34,35; 3:22,23,25; 4:11,25,26; 7:3,7,27,28,32,33,37,40,42,43,49,50,53; 8:28,30,32,33; 10:43;13:15,27,29,33,39; 15:5,15-17,21; 17:2,11; 18:13.24,28; 21:20,24; 22:12; 23:3,5; 24:14; 26:22; 28:23,26,27; Rom 1:2,17; 2:10-21,31; 4:3,7,17,18,23,24; 5:13; 7:1-3,7,12,14,16; 8:4,36; 9:4,9,12,13,15,17,25-29,33; 10:11,15,19; 11:2-4,8,9,26,27; 12:19,20; 13:8-10; 14:11; 15:3,4,9-12,21; 16:16,26,27; 1Cor. 1:19,31; 2:9; 3:19,20; 4:6; 6:16; 7:39; 9:9,10; 10:7,11,26,28; 14:21,34; 15:3,4,32,45,54,55; 2Cor. 1:13; 2:3,4; 3:7,15; 4:13; 6:2;16; 7:12; 8:15; 9:9; 10:17; 13:1; Gal. 3:6,8,10-13; 4:22,27,30; 5:14; Eph. 3:3,4; (cf. 2Pt. 3:16); Eph. 4:8; 5:31; 6:2,3; (cf. Dt. 5:16); Col. 4:16; 1Thes. 5:27; 1Tim. 5:18; 2Tim. 3:14,16,17; Heb. 1:5,7-13; 2:5-8,12,13; 3:7-11,15; 4:3,4,7; 5:5,6; 6:14; 7:17,21,28; 8:5,8-13; 9:20; 10:5-916,17,28,30,37; 11:18; 12:5,6,12,26,29; 13:5,6,22; James 2:8,23; 4:5; 1Pet. 1:16,24,25; 2:6,7,22; 3:10-12; 5:5,12; 2Pet. 1:20,21; 2:22; 3:1,15,16; 1Jn. 1:4; 2:1,7,8,12,13,21; 5:13; Rev. 1:3,11,19; 2:1,8,12,18; 3:1,7,12,14; 14:13; 19:9; 21:5; 22:6,7;10,18,19 (Note: while the Bible reveals that there is revelation which is not written down, (2Cor. 12:4; Rv. 10:4) yet interestingly, a study of the the phrase “the word of God” or “the word of the Lord” shows that revelation that is referred to as being that normally was subsequently written down. Nor was the oral truth referred to in 2Thes. 2:15 that of nebulous ancient traditions (which can also result in different interpretations, such as the Roman Catholics and EOs example), but what Paul referred to was known instruction by a manifestly Divinely inspired apostle, whose manner was to reason out of the Scriptures, (Acts 17:2) and whose words were examined for veracity by Scripture. (Acts 17:11) And there is no proof that these oral truths were also not subsequently written down.
Note also that (reiterating what was prior expressed) Scripture reveals the Truth of God being established by testimony in both in text and in power, by way of textual conformity to what had been prior established as written Truth (God first confirming the faith of men like Abraham and Moses in virtue and power, and the latter providing the Law as the standard by which further revelation was tested by), and by conformity in Heavenly qualities and manifest effects, and often by the manner of supernatural attestation by the power of God given to it and to the intruments thereof (and most overtly to the authority of those who progressively added conflationary, complimentary new teachings to Scripture). Thus writings called Scripture were themselves progressively established as being the assured Word of God (though they were such before men recogized them as being so), to the glory of God their author. However, while the references above provide abundant evidence to the textual aspect, the many that could be provided to the testimony to Truth in power are not, such as 2Ki. 5:15; Josh. 3:7 (cf. Is. 63:12); 2Ki. 18:6,7; Jer. 15:16; Ps. 19:7-11; Ps. 119; Mk. 16:20; Jn. 5:36; 14:11,12; Acts 4:33; 15:7-18; Rm. 15:19; 1Cor. 4:20; 2Cor. 6:1-10; 12:12; Gal. 4:6; 1Thes. 1:3-10, Heb. 2:3,4).