From BDAG (A Greek-English Lexicon of the NT and other Early Christian Literature):
② marker of connection between coordinate nonsequential items
ⓐ used alone, and: τέ thus connects single concepts, parts of clauses, or words (Just., A II, 11, 4; s. Kühner-G. II 241; Schwyzer II 574–76; Denniston 497–503) ἐν ἀγάπῃ πνεύματί τε πραΰτητος 1 Cor 4:21. θεοῦ ῥῆμα δυνάμεις τε μέλλοντος αἰῶνος Hb 6:5. Cp. 9:1. ἔκλασεν ἄρτον ὕδωρ τε προσήνεγκεν AcPl Ha 4, 4; relative clause ἅ τε Ἀριστίων … λέγουσιν Papias (2:4). Participles: συναχθέντες συμβούλιόν τε λαβόντες Mt 28:12; φοβούμενος τὸν θεὸν μαρτυρούμενός τε Ac 10:22; cp. Mt 27:48; Ac 2:33; 20:11; 28:23a; Hb 1:3; 6:4. Infinitives: ἁρπάσαι αὐτὸν ἐκ μέσου αὐτῶν ἄγειν τε Ac 23:10; cp. 11:26; 24:23; 27:21b; Eph 3:19.
ⓑ τὲ … τέ, used as connecter of sentences and parts of sentences that are closely related to each other as … so, not only … but also (Kühner-G. II 243; Schwyzer II 573f; Denniston 503–5; Jos., Ant. 1, 92) μάρτυρα ὧν τε εἶδές με ὧν τε ὀφθήσομαί σοι Ac 26:16 (on the constr. s. ὁράω A1b). ἐάν τε γὰρ ζῶμεν, τῷ κυρίῳ ζῶμεν, ἐάν τε ἀποθνῄσκωμεν, τῷ κυρίῳ ἀποθνῄσκομεν for just as when we live, we live to the Lord, so also when we die, we die to the Lord Ro 14:8a. ἐάν τε οὖν ζῶμεν ἐάν τε ἀποθνῄσκωμεν, τοῦ κυρίου ἐσμέν so, not only if we live, but also if we die (i.e. whether we live or die) we belong to the Lord vs. 8b. Cp. Ac 2:46; 17:4; 26:10. τε γάρ ‘for the fact is that’ is one way of rendering this combination (X., Mem. 1, 1, 3; Just., D. 3, 5; Ath. 2, 4) Ro 1:26; 7:7; Hb 2:11.
I would see the τέ 's in Heb 6:2 as more or less just a stronger καὶ - the subjects of what is being "taught" are more closely related to each other than what's being mentioned prior and after.
As for why τέ is appearing after ἐπιθέσεώς rather than before it (βαπτισμῶν διδαχὴν τε ἐπιθέσεώς χειρῶν), τέ is known as an enclitic particle, and so comes after its "host" (that is, the thing it's connecting). Hence why it also comes after ἀναστάσεώς rather than before it.
If you don't have BDAG, Jacob, I'd certainly recommend it as a purchase
I tried reading Wallace (beyond the basics) on the matter, but it wasn't of much use.
You may find that quite a bit. BDF (A Greek Grammar of the NT and other Early Christian Literature) will be better. Not cheap buy's I know (esp. the Lexicon: over £100 on Amazon UK), but worth the money