Here's some hints:

Eldrad's hand, Fendahl core skull, Concorde, Morbius's brain, Cybermat, Foamasi, Sea Devil Gun, 7th Doctor's Umbrella, Sontaran Helmet, TARDIS console, Cyberman head, Chameleon Tours rocket, Tin Soldier from The Mind Robber, K-9, Aztec symbol (behind guitar), a space helmet for a cow, a deadly daffodil, Sharaz Jek's mask, a chessboard (from The Curse of Fenric), bagpipes, Red Kangs graffiti, time equation scrawlings (from The Leisure Hive), Black Orchid (the book), a dinosaur, a horse (from Survival), a cricket bat, the Mona Lisa, a homicidal Varga plant, the Master's TARDIS, Hal's bow and arrows, Jon Pertwee's title sequence, a dematerialisation circuit, a fishing rod, (from The Androids of Tara), the TARDIS's roundels & interior door, a French flag (presumably from The Reign of Terror), and some swords from Battlefield.

That's about all I could recognise.